List of U.S. Congress incumbents who did not run for re-election in 2018

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2018 Federal Election Analysis
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This page lists the incumbent members of the 115th U.S. Congress who did not run for re-election in the 2018 congressional elections for both U.S. Senate and U.S. House.

For a list of incumbents that did not seek re-election in 2016, click here. For a list of incumbents that did not run for re-election in 2020, click here.

U.S. Senate members

  • Democratic Party 0 Democrats
  • Republican Party 3 Republicans
NamePartyStateDate announcedWinner of open seat
Bob CorkerRepublican Party RepublicanTennesseeSeptember 26, 2017[1]Republican Party Marsha Blackburn
Jeff FlakeRepublican Party RepublicanArizonaOctober 24, 2017[2]Democratic Party Kyrsten Sinema
Orrin HatchRepublican Party RepublicanUtahJanuary 2, 2018[3]Republican Party Mitt Romney

U.S. House members

A total of 52 representatives did not seek re-election to their U.S. House districts:

  • Democratic Party 18 Democratic members of the U.S. House
  • Republican Party 34 Republican members of the U.S. House

In total, 14 of the 52 districts changed party hands. Eleven seats flipped from Republican to Democrat. Three seats flipped from Democrat to Republican.

Incumbents who retired from public office

  • Democratic Party Nine Democrats
  • Republican Party 23 Republicans
NamePartyDistrictDate announcedWinner of open seat
Bill ShusterRepublican Party RepublicanPennsylvania, District 9January 2, 2018[4]Republican Party Dan Meuser
Bob GoodlatteRepublican Party RepublicanVirginia, District 6November 9, 2017[5]Republican Party Ben Cline
Carol Shea-PorterDemocratic Party DemocraticNew Hampshire, District 1October 6, 2017[6]Democratic Party Chris Pappas
Darrell IssaRepublican Party RepublicanCalifornia, District 49January 10, 2018[7]Democratic Party Mike Levin
Dave ReichertRepublican Party RepublicanWashington, District 8September 6, 2017[8]Democratic Party Kim Schrier
David TrottRepublican Party RepublicanMichigan, District 11September 11, 2017[9]Democratic Party Haley Stevens
Dennis RossRepublican Party RepublicanFlorida, District 15April 11, 2018[10]Republican Party Ross Spano
Edward RoyceRepublican Party RepublicanCalifornia, District 39January 8, 2018[11]Democratic Party Gil Cisneros
Elizabeth EstyDemocratic Party DemocraticConnecticut, District 5April 2, 2018[12]Democratic Party Jahana Hayes
Frank LoBiondoRepublican Party RepublicanNew Jersey, District 2November 7, 2017[13]Democratic Party Jeff Van Drew
Gene GreenDemocratic Party DemocraticTexas, District 29November 13, 2017[14]Democratic Party Sylvia Garcia
Gregg HarperRepublican Party Republican Mississippi, District 3January 4, 2018[15]Republican Party Michael Guest
Ileana Ros-LehtinenRepublican Party RepublicanFlorida, District 27April 30, 2017[16]Democratic Party Donna Shalala
Jeb HensarlingRepublican Party RepublicanTexas, District 5October 31, 2017[17]Republican Party Lance Gooden
Joe BartonRepublican Party RepublicanTexas, District 6November 30, 2017[18]Republican Party Ron Wright
John J. Duncan, Jr.Republican Party RepublicanTennessee, District 2July 31, 2017[19]Republican Party Tim Burchett
Lamar SmithRepublican Party RepublicanTexas, District 21November 2, 2017[20]Republican Party Chip Roy
Luis V. GutierrezDemocratic Party DemocraticIllinois, District 4November 27, 2017[21]Democratic Party Jesus Garcia
Lynn JenkinsRepublican Party RepublicanKansas, District 2January 25, 2017[22]Republican Party Steve Watkins
Niki TsongasDemocratic Party DemocraticMassachusetts, District 3August 9, 2017[23]Democratic Party Lori Trahan
Paul RyanRepublican Party RepublicanWisconsin, District 1April 11, 2018[24]Republican Party Bryan Steil
Rick NolanDemocratic Party DemocraticMinnesota, District 8February 9, 2018[25]Republican Party Pete Stauber
Robert BradyDemocratic Party DemocraticPennsylvania, District 1January 31, 2018[26]Republican Party Brian Fitzpatrick
Rodney FrelinghuysenRepublican Party RepublicanNew Jersey, District 11January 29, 2018[27]Democratic Party Mikie Sherrill
Ruben J. KihuenDemocratic Party DemocraticNevada, District 4December 16, 2017[28]Democratic Party Steven Horsford
Ryan CostelloRepublican Party RepublicanPennsylvania, District 6March 25, 2018[29]Democratic Party Chrissy Houlahan
Sam JohnsonRepublican Party RepublicanTexas, District 3January 6, 2017[30]Republican Party Van Taylor
Sandy LevinDemocratic Party DemocraticMichigan, District 9December 2, 2017[31]Democratic Party Andy Levin
Ted PoeRepublican Party RepublicanTexas, District 2November 7, 2017[32]Republican Party Daniel Crenshaw
Thomas GarrettRepublican Party RepublicanVirginia, District 5May 28, 2018[33]Republican Party Denver Riggleman
Thomas RooneyRepublican Party RepublicanFlorida, District 17February 19, 2018[34]Republican Party Greg Steube
Trey GowdyRepublican Party RepublicanSouth Carolina, District 4January 31, 2018[35]Republican Party William Timmons

Incumbents who sought other offices

U.S. House members who ran for president

Democratic Party One Democrat
Republican Party 0 Republicans

NamePartyOfficeDate announcedWinner of open seat
John DelaneyDemocratic Party DemocraticMaryland, District 6July 28, 2017[36]Democratic Party David Trone

U.S. House members who sought a seat in the U.S. Senate

Democratic Party 3 Democrats
Republican Party 7 Republicans

NamePartyOfficeDate announcedWinner of open seat
Beto O'RourkeDemocratic Party DemocraticTexas, District 16March 31, 2017[37]Democratic Party Veronica Escobar
Jacky RosenDemocratic Party DemocraticNevada, District 3July 6, 2017[38]Democratic Party Susie Lee
James B. Renacci[39][40]Republican Party RepublicanOhio, District 16January 11, 2018[41]Republican Party Anthony Gonzalez
Kevin CramerRepublican Party RepublicanNorth Dakota, At-Large DistrictFebruary 15, 2018[42]Republican Party Kelly Armstrong
Kyrsten SinemaDemocratic Party DemocraticArizona, District 9May 29, 2018[43]Democratic Party Greg Stanton
Lou BarlettaRepublican Party RepublicanPennsylvania, District 11August 29, 2017[44]Democratic Party Lloyd Smucker
Luke MesserRepublican Party RepublicanIndiana, District 6August 14, 2017[45]Republican Party Greg Pence
Marsha BlackburnRepublican Party RepublicanTennessee, District 7October 5, 2017[46]Republican Party Mark Green
Martha McSallyRepublican Party RepublicanArizona, District 2January 12, 2018[47]Democratic Party Ann Kirkpatrick
Todd RokitaRepublican Party RepublicanIndiana, District 4August 9, 2017[48]Republican Party Jim Baird

U.S. House members who ran for governor

Democratic Party 4 Democrats
Republican Party 4 Republicans

NamePartyOfficeDate announcedWinner of open seat
Colleen HanabusaDemocratic Party DemocraticHawaii, District 1September 1, 2017[49]Democratic Party Ed Case
Diane BlackRepublican Party RepublicanTennessee, District 6August 2, 2017[50]Republican Party John Rose
Jared PolisDemocratic Party DemocraticColorado, District 2June 11, 2017[51]Democratic Party Joe Neguse
Kristi L. NoemRepublican Party RepublicanSouth Dakota, At-Large DistrictNovember 14, 2016[52]Republican Party Dusty Johnson
Michelle Lujan GrishamDemocratic Party DemocraticNew Mexico, District 1December 13, 2016[53]Democratic Party Debra Haaland
Raul R. LabradorRepublican Party RepublicanIdaho, District 1May 9, 2017[54]Republican Party Russ Fulcher
Steve PearceRepublican Party RepublicanNew Mexico, District 2July 10, 2017[55]Democratic Party Xochitl Torres Small
Tim WalzDemocratic Party DemocraticMinnesota, District 1March 27, 2017[56]Republican Party Jim Hagedorn

U.S. House members who ran for state attorney general

Democratic Party 1 Democrat
Republican Party 0 Republicans

NamePartyOfficeDate announcedWinner of open seat
Keith EllisonDemocratic Party DemocraticMinnesota, District 5June 5, 2018[57]Democratic Party Ilhan Omar


Congressional incumbents who left office early or announced resignations

NamePartyOfficeDate left officeWinner
Al FrankenDemocratic Party DemocraticU.S. Senate, MinnesotaDecember 7, 2017[58]Democratic Party Tina Smith
Blake FarentholdRepublican Party RepublicanU.S. House, Texas District 27April 6, 2018[59]Republican Party Michael Cloud
Charlie DentRepublican Party RepublicanU.S. House, Pennsylvania District 15May 12, 2018[60]Democratic Party Glenn Thompson
Evan JenkinsRepublican Party RepublicanU.S. House, West Virginia District 3September 30, 2018[61]Republican Party Carol Miller
Jason ChaffetzRepublican Party RepublicanU.S. House, Utah District 3June 30, 2017[62]Republican Party John Curtis
Jeff SessionsRepublican Party RepublicanU.S. Senate, AlabamaFebruary 9, 2017[63]Democratic Party Doug Jones
Jim BridenstineRepublican Party RepublicanU.S. House, Oklahoma 1April 23, 2018[64]Republican Party Kevin Hern
John Conyers, Jr.Democratic Party DemocraticU.S. House, Michigan District 13December 5, 2017[65]Democratic Party Rashida Tlaib
Louise SlaughterDemocratic Party DemocraticU.S. House, New York District 25March 16, 2018[66]Democratic Party Joseph Morelle
Michael "Mick" MulvaneyRepublican Party RepublicanU.S. House, South Carolina District 5February 16, 2017[67] Republican Party Ralph Norman
Mike PompeoRepublican Party RepublicanU.S. House, Kansas District 4January 23, 2017[68]Republican Party Ron Estes
Patrick MeehanRepublican Party RepublicanU.S. House, Pennsylvania District 7April 27, 2018[69]Democratic Party Mary Gay Scanlon
Patrick J. TiberiRepublican Party RepublicanU.S. House, Ohio District 12January 15, 2018[70]Republican Party Troy Balderson
Ron DeSantisRepublican Party RepublicanU.S. House, Florida District 6September 10, 2018[71]Republican Party Michael Waltz
Ryan ZinkeRepublican Party RepublicanU.S. House, Montana At-LargeMarch 1, 2017[72]Republican Party Greg Gianforte
Thad CochranRepublican Party RepublicanU.S. Senate, MississippiApril 1, 2018[73]Republican Party Cindy Hyde-Smith
Tim MurphyRepublican Party RepublicanU.S. House, Pennsylvania District 18October 21, 2017[74]Democratic Party Conor Lamb
Tom PriceRepublican Party RepublicanU.S. House, Georgia District 6February 10, 2017[75]Republican Party Karen Handel
Trent FranksRepublican Party RepublicanU.S. House, Arizona District 8December 8, 2017[76]Republican Party Debbie Lesko
Xavier BecerraDemocratic Party DemocraticU.S. House, California District 34January 24, 2017[77]Democratic Party Jimmy Gomez
John McCainEnds.png RepublicanU.S. Senate, ArizonaAugust 25, 2018[78]Republican Party Jon Kyl

Analysis

Historical comparison

The following table includes figures on Democratic and Republican members of Congress who either left office during their term or announced that they would not seek re-election for each election year since 2012.

Outgoing members of Congress, 2012-2018
Year Chamber Democrats not seeking re-election Republicans not seeking re-election Total not seeking re-election Democrats leaving office early Republicans leaving office early Total leaving office early
2018
U.S. Senate 0 3 3 1 2 3
U.S. House 18 34 52 3 14 17
Total 18 37 55 4 16 20
2016
U.S. Senate 3 2 5 0 0 0
U.S. House 16 24 40 2 5 7
Total 19 26 45 2 5 7
2014
U.S. Senate 5 2 7 3 2 5
U.S. House 16 25 41 3 6 9
Total 21 27 48 6 8 14
2012
U.S. Senate 6 3 10[79] 0 0 0
U.S. House 23 20 43 4 1 5
Total 29 23 53 4 1 5

Retirements as a percentage of party caucus

The number of retirements in each party as a percentage of the party's total number of Congressional members illustrates the amount of turnover happening within a party in a given election cycle. The table below shows Congressional retirements as a percentage of each party's total caucus members immediately following the previous election.

Retirements as percent of Democrat and Republican caucus
Cycle Total retiring incumbents Retiring Democrats Retiring Democrats as percentage of caucus Retiring Republicans Retiring Republicans as percentage of caucus
2022 55 32 11.85% 23 8.75%
2020 40 10 3.57% 29 11.46%
2018 55 18 7.44% 37 12.63%
2016 45 19 8.12% 26 8.64%
2014 48 21 8.47% 27 9.41%

Prior election margins of victory

Retirements in districts with a narrow margin of victory (MOV) can indicate a potentially competitive election in the next cycle. Retirements from seats with a margin of victory of less than 10 percentage points in each election cycle included:

  • Seven Democrats and three Republicans out of 56 total retirements in the 2022 cycle
  • Seven Republicans out of 40 total retirements in the 2020 cycle
  • Five Democrats and three Republicans out of 55 total retirements in the 2018 cycle
  • Five Democrats and one Republican out of 45 total retirements in the 2016 cycle
  • Five Democrats and Five Republicans out of 48 total retirements in the 2014 cycle
Retirements in districts that had a MOV of 10 percentage points or less in the prior cycle, 2014-2022
Cycle Total retiring incumbents Retiring incumbents with MOV of <10% Retiring Democrats with MOV of <10% Retiring Republicans with MOV of <10%
2022 55 10 7 3
2020 40 7 0 7
2018 55 8 5 3
2016 45 6 5 1
2014 48 10 5 5

The average 2016 margin of victory of House incumbents not running for re-election in 2018 was 29.7 percent. By comparison, the average 2014 margin of victory of those House members who did not run for re-election in 2016 was 34.1 percent.

Ballotpedia noted the margin of victory in the previous election of U.S. House incumbents who did not run for re-election in 2018, as compared to those incumbents who did not run for re-election in 2016. This data is shown in the chart below. The average margin of victory in all U.S. House races in 2016 was 36.7 percent.

Note: This data for this analysis includes six members who announced they were not running for re-election in the 2018 cycle prior to their resigning from the House of Representatives.

Congressional retirements by month, 2011-2020

See also: Congressional retirements by month, 2011-2020

Between January 2011 and June 2024, Ballotpedia tracked 354 announcements from members of the U.S. House and Senate who announced they would not run for re-election. January had the highest number of members announcing they would not run for re-election at 67. Forty-seven of those took place during election years and 20 during odd-number years. The fewest announcements took place in June at 12—nine during off years and three during election years.

Hover over the bars in the chart below to see the number of even- and odd-year announcements by month.

November had the second-highest total announcements at 46. Five November announcements occurred during an election year and 41 occurred during an off year.

August saw the second-fewest announcements after June at 15. All but one occurred during off years.

Announcements by month and year

The following table shows the number of members who announced they would not run for re-election by month and by year. Click on a month to sort the table in ascending or descending order by that month.

Wave election analysis

See also: Wave elections (1918-2016)

The term wave election is frequently used to describe an election cycle in which one party makes significant electoral gains. How many seats would Republicans have had to lose for the 2018 midterm election to be considered a wave election?

Ballotpedia examined the results of the 50 election cycles that occurred between 1918 and 2016—spanning from President Woodrow Wilson's (D) second midterm in 1918 to Donald Trump's (R) first presidential election in 2016. We define wave elections as the 20 percent of elections in that period resulting in the greatest seat swings against the president's party.

Applying this definition to U.S. House elections and U.S. Senate elections, we found that Republicans needed to lose 48 House seats and seven Senate seats for 2018 to qualify as a wave election in each chamber.

The chart below shows the number of seats the president's party lost in the 11 U.S. House waves from 1918 to 2016. Click here to read the full report.

U.S. House wave elections
Year President Party Election type House seats change House majority[80]
1932 Hoover R Presidential -97 D
1922 Harding R First midterm -76 R
1938 Roosevelt D Second midterm -70 D
2010 Obama D First midterm -63 R (flipped)
1920 Wilson D Presidential -59 R
1946 Truman D First midterm -54 R (flipped)
1994 Clinton D First midterm -54 R (flipped)
1930 Hoover R First midterm -53 D (flipped)
1942 Roosevelt D Third midterm -50 D
1966 Johnson D First midterm[81] -48 D
1974 Ford R Second midterm[82] -48 D

The chart below shows the number of seats the president's party lost in the 10 U.S. Senate waves from 1918 to 2016. Click here to read the full report.

U.S. Senate wave elections
Year President Party Election type Senate seats change Senate majority[83]
1932 Hoover R Presidential -13 D (flipped)
1958 Eisenhower R Second midterm -12 D
1946 Truman D First midterm -10 R (flipped)
1980 Carter D Presidential -9 R (flipped)
2014 Obama D Second midterm -9 R (flipped)
1942 Roosevelt D Third midterm -8 D
2008 George W. Bush D Presidential -8 D
1926 Coolidge R First midterm[84] -7 R
1930 Hoover R First midterm -7 R
1986 Reagan R Second midterm -7 D (flipped)

See also

Footnotes

  1. CNBC, "Republican Sen. Bob Corker of Tennessee will not seek re-election," September 26, 2017
  2. Politico, "Flake retiring after 2018," October 24, 2017
  3. WMTV NBC 15, "Utah GOP Senator Orrin Hatch announces plans to retire," January 2, 2018
  4. The Hill, "GOP Rep. Shuster won't seek reelection," January 2, 2018
  5. Congressman Bob Goodlatte, "Goodlatte: It’s An Honor to Serve You," November 9, 2017
  6. The Hill, "Vulnerable Democrat won’t seek reelection," October 6, 2017
  7. CNBC, "California GOP Darrell Issa will retire, giving Democrats another chance to win a seat," January 10, 2018
  8. The Washington Post, "Dave Reichert, a swing seat Republican, will retire from the House," September 6, 2017
  9. The Detroit News, "Rep. Dave Trott is retiring from U.S. House," September 11, 2017
  10. The Hill, "GOP Rep. Ross won't seek reelection," April 11, 2018
  11. The Hill, "House Foreign Affairs chairman to retire," January 8, 2018
  12. Hartford Courant, "Elizabeth Esty Not Running For Re-Election," April 2, 2018
  13. Congressman Frank LoBiondo, "LoBiondo Statement on 2018 Election," accessed November 7, 2017
  14. Politico, "Rep. Gene Green to retire," November 13, 2017
  15. Clarion Ledger, "Harper won't seek re-election," January 4, 2018
  16. Miami Herald, "Why I’m retiring from Congress. A message from Ileana Ros-Lehtinen," April 30, 2017
  17. Dallas News, "Republican Jeb Hensarling won't run for re-election," October 31, 2017
  18. Dallas News, "Rep. Joe Barton: I will not seek re-election," November 30, 2017
  19. WVLT TV, "Congressman Jimmy Duncan will not seek re-election next year," July 31, 2017
  20. The Hill, "Lamar Smith to retire from Congress," November 2, 2017
  21. Politico, "Gutierrez won't seek reelection," November 27,2017
  22. WIBW, "Rep. Lynn Jenkins will not run "for any office in 2018"," January 25, 2017
  23. Boston Herald, "Buzz builds over potential candidates to fill Niki Tsongas' seat," August 9, 2017
  24. CNN, "House Speaker Paul Ryan won't seek re-election: 'I like to think I've done my part'," April 11, 2018
  25. MinnPost, "Rep. Rick Nolan will retire," February 9, 2018
  26. The Hill, "Pennsylvania Dem not running for reelection," January 31, 2018
  27. Politico, "Frelinghuysen won’t seek reelection," January 29, 2018
  28. The Hill, "Kihuen won't seek reelection amid sexual harassment allegations," December 16, 2017
  29. The Hill, "Costello won't seek reelection in Pennsylvania," March 25, 2018
  30. The Hill, "Texas Rep. Sam Johnson to retire," January 6, 2017
  31. Fox News, "Democrat Sandy Levin retiring from House, won't seek 19th term in 2018," December 2, 2017
  32. CNN, "Texas Republican Rep. Ted Poe announces retirement", November 7, 2017
  33. POLITICO, "Garrett to quit Congress amid servant scandal, alcoholism," May 28, 2018
  34. Tampa Bay Times, "Rep. Tom Rooney will not seek re-election," February 19, 2018
  35. The Hill, "Trey Gowdy announces retirement from Congress," January 30, 2018
  36. Los Angeles Times, "Rep. John Delaney of Maryland to run for president," July 28, 2017
  37. The Dallas Morning News, "Beto O'Rourke launches 2018 Senate campaign in underdog bid to unseat Ted Cruz," March 31, 2017
  38. Las Vegas Review-Journal, "Rosen’s Senate bid the first 2018 political domino to fall in Nevada," July 6, 2017
  39. Renacci originally announced he would not seek re-election on March 20, 2017, in order to run for governor.
  40. Roll Call, "Who Could Replace Ohio Rep. Jim Renacci in Congress?" March 20, 2017
  41. Cleveland.com, "Jim Renacci drops out of the Ohio governor's race to run for Senate," January 11, 2018
  42. The Washington Post, "Republican Kevin Cramer to run for Senate in North Dakota in boost for GOP," February 15, 2018
  43. ABC15, "Kyrsten Sinema files signatures to run for US Senate," May 29, 2018
  44. USA Today, "Rep. Lou Barletta announces challenge to Sen. Bob Casey in 2018 Senate race," August 29, 2017
  45. WFYI, "Luke Messer Kicks Off 2018 Senate Campaign," August 14, 2017
  46. NPR, "Marsha Blackburn, 'Politically Incorrect And Proud Of It,' Runs For Senate In Tenn.," October 5, 2017
  47. USA Today, "Arizona Rep. Martha McSally announces she's running for Senate," January 12, 2018
  48. WBAA, "Rokita Launches Senate Bid In Crowded Republican Field," August 9, 2017
  49. Hawaii News Now, "U.S. Rep. Hanabusa throws her name in the hat for 2018 gubernatorial race," September 1, 2017
  50. The Tennessean, "Diane Black enters race for governor of Tennessee," August 2, 2017
  51. The Denver Post, " Jared Polis to join crowded 2018 race for governor, tells The Post he wants 'a Colorado that works for everybody,'" June 11, 2017
  52. Argus Leader, "Noem announces historic bid for governor," November 14, 2016
  53. Albuquerque Journal, "Lujan Grisham running for governor," December 13, 2016
  54. Politico, "Labrador to run for Idaho governor," May 9, 2017
  55. Albuquerque Business First, "NM congressman announces run for governor," July 10, 2017
  56. Minneapolis Star Tribune, "U.S. Rep. Tim Walz running for governor," March 27, 2017
  57. The Washington Post, "Keith Ellison to leave Congress and run for attorney general in Minnesota," June 5, 2018
  58. The Week, "Al Franken announces resignation following allegations of inappropriate behavior," December 7, 2017
  59. Roll Call, "Farenthold Resigns After Sexual Harassment Scandal," April 6, 2018
  60. Twitter, "Craig Caplan," May 8, 2018
  61. Roll Call, "Evan Jenkins to Resign Seat on Sunday, Head to West Virginia Supreme Court," September 27, 2018
  62. Utah Policy, "Rules for special election to replace Chaffetz set, but lawsuits loom," May 19, 2017
  63. Senate.gov, "On the Nomination (Confirmation Jeff Sessions, of Alabama, to be Attorney General)" February 8, 2017
  64. CBS News, "Jim Bridenstine sworn in as NASA administrator," April 23, 2018
  65. Chicago Tribune, "U.S. Rep. John Conyers announces retirement from Congress," December 5, 2017
  66. CNN, "Rep. Louise Slaughter, New York Democratic 'trailblazer,' dead at 88," March 16, 2018
  67. Politico, "Senate confirms Mulvaney to head Office of Management and Budget," February 16, 2017
  68. CBS News, "Mike Pompeo confirmed by Senate as new CIA director," January 23, 2017
  69. The Hill, "Meehan resigns with promise to pay back alleged sexual harassment claim," April 27, 2018
  70. The Columbus Dispatch, "Tiberi’s last day in Congress will be Jan. 15," January 3, 2018
  71. The Hill, "DeSantis resigns House seat to focus on governor's race," September 10, 2018
  72. Senate.gov, "On the Nomination (Confirmation Ryan Zinke, of Montana, to be Secretary of the Interior)," accessed December 17, 2018
  73. Politico, "Cochran to resign April 1," March 5, 2018
  74. Politico, "Tim Murphy resigns from Congress," October 5, 2017
  75. The New York Times, "Tom Price Is Confirmed as Health Secretary," February 10, 2017
  76. Washington Post, "Rep. Trent Franks, facing ethics investigation, says he will resign immediately," December 8, 2017
  77. National Association of Attorneys General, "Xavier Becerra," accessed September 26, 2019
  78. USA Today, "Sen. John McCain, American 'maverick' and political giant, dies at 81," August 25, 2018
  79. Figure includes Sen. Joe Lieberman (I-Conn.).
  80. Denotes the party that had more seats in the U.S. House following the election.
  81. Lyndon Johnson's (D) first term began in November 1963 after the death of President John F. Kennedy (D), who was first elected in 1960. Before Johnson had his first midterm in 1966, he was re-elected president in 1964.
  82. Gerald Ford's (R) first term began in August 1974 following the resignation of President Richard Nixon (R), who was first elected in 1968 and was re-elected in 1972. Because Ford only served for two full months before facing the electorate, this election is classified as Nixon's second midterm.
  83. Denotes the party that had more seats in the U.S. House following the election.
  84. Calvin Coolidge's (R) first term began in August 1923 after the death of President Warren Harding (R), who was first elected in 1920. Before he had his first midterm in 1926, Coolidge was re-elected as president in 1924.