2020 United States Senate elections

2020 United States Senate elections
Class 2 (33 of the 100) seats in the United States Senate; (and 1 special election); 51 seats needed for a majority
	Seats up for election:; Democratic incumbent; Republican incumbent; Undetermined incumbent; No election

Elections to the United States Senate will be held on November 3, 2020, with the 33 Class 2 seats of the Senate being contested in regular elections. The winners will be elected to six-year terms extending from January 3, 2021, until January 3, 2027. Additionally, there will be a special election in Arizona to fill the vacancy created by the death of John McCain in 2018.

In 2014 (the last regular election of the Class 2 Senate seats), Republicans won a net gain of nine seats from the Democrats. Therefore, Republicans have significantly more seats to defend in 2020 than Democrats do, though many of those seats are not initially considered competitive.

Partisan composition

The composition of the Senate going into the 2020 election will depend on the results of the 2018 elections. In the 2020 election, all 33 Class 2 Senate seats are up for election; there are currently 20 Republicans and 12 Democrats whose seats will be up for election and one seat to be determined in the 2018 elections. The exact numbers could change if vacancies or party switches occur. Additional special elections may also be held in 2020 if vacancies arise in Class 1 or Class 3 Senate seats.

Parties		Democratic	Republican	Independent	Total
Parties		style="background-color:Template:Democratic Party (United States)/meta/color" \|	style="background-color:Template:Republican Party (United States)/meta/color" \|	style="background-color:Template:Independent (United States)/meta/color" \|	Total
Last election (2018)		45	53	2	100
Before this election		45	53	2	100
Not up		33	31	2	66
	Class 1 (2018→2024)	21	10	2	33
	Class 3 (2016→2022)	12	21	0	33
Up		12	21	0	34
	Class 2 (2014→2020)	12	20	0	33
	Special: Class 3	0	1	0	1

Incumbent retiring		0	0	0	0
Incumbent running		1	2	0	3
Intent undeclared		11	19	0	31

Change in composition

Each block represents one of the one hundred seats in the U.S. Senate. "D#" is a Democratic senator, "I#" is an Independent senator, and "R#" is a Republican senator. They are arranged so that the parties are separated and a majority is clear by crossing the middle.

Before the elections

Each block indicates an incumbent senator's actions going into the election: Some "Ran" for re-election, some "Retired," and the remainder (without a note) were not up for election this year. Before the elections, Democrats had at least 45 seats, Independents 2, and Republicans had at least a 52 seat majority.

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈	D₂₉	D₃₀
D₄₀ Running	D₃₉ Undeclared	D₃₈ Running	D₃₇ Undeclared	D₃₆ Running	D₃₅ Running	D₃₄ Running	D₃₃	D₃₂	D₃₁
D₄₁ Undeclared	D₄₂ Undeclared	D₄₃ Undeclared	D₄₄ Undeclared	D₄₅ Undeclared	I₁	I₂	R₅₃ Undeclared	R₅₂ Undeclared	R₅₁ Undeclared
Majority →									R₅₁ Undeclared
R₄₁ Undeclared	R₄₂ Undeclared	R₄₃ Undeclared	R₄₄ Undeclared	R₄₅ Undeclared	R₄₆ Undeclared	R₄₇ Undeclared	R₄₈ Undeclared	R₄₉ Running	R₅₀ Undeclared
R₄₀ Undeclared	R₃₉ Retiring	R₃₈ Undeclared	R₃₇ Undeclared	R₃₆ Undeclared	R₃₅ Undeclared	R₃₄ Undeclared	R₃₃ Running	R₃₂ Running	R₃₁
R₂₁	R₂₂	R₂₃	R₂₄	R₂₅	R₂₆	R₂₇	R₂₈	R₂₉	R₃₀
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

After the elections

D₁	D₂	D₃	D₄	D₅	D₆	D₇	D₈	D₉	D₁₀
D₂₀	D₁₉	D₁₈	D₁₇	D₁₆	D₁₅	D₁₄	D₁₃	D₁₂	D₁₁
D₂₁	D₂₂	D₂₃	D₂₄	D₂₅	D₂₆	D₂₇	D₂₈	D₂₉	D₃₀
TBD	TBD	TBD	TBD	TBD	I₂	I₁	D₃₃	D₃₂	D₃₁
TBD	TBD	TBD	TBD	TBD	TBD	TBD	TBD	TBD	TBD
Majority →									TBD
Majority →									TBD
TBD	TBD	TBD	TBD	TBD	TBD	TBD	TBD	TBD	TBD
TBD	TBD	TBD	TBD	TBD	TBD	TBD	TBD	TBD	R₃₁
R₃₀	R₂₉	R₂₈	R₂₇	R₂₆	R₂₅	R₂₄	R₂₃	R₂₂	R₂₁
R₂₀	R₁₉	R₁₈	R₁₇	R₁₆	R₁₅	R₁₄	R₁₃	R₁₂	R₁₁
R₁	R₂	R₃	R₄	R₅	R₆	R₇	R₈	R₉	R₁₀

Key:

D_#	Democratic
R_#	Republican
I_#	Independent, caucusing with Democrats

Potentially competitive races

Potentially competitive Republican-held seats up for election in 2020 include Arizona, Colorado, Georgia, Iowa, Maine, Kentucky, Montana, and North Carolina. Democratic-held seats in Alabama, Minnesota, Michigan, Virginia, and New Hampshire may also be competitive.^[1]

Pre-election predictions

Most election predictors use:

"tossup": no advantage
"tilt" (used sometimes): advantage that is not quite as strong as "lean"
"lean": slight advantage
"likely" or "favored": significant, but surmountable, advantage
"safe" or "solid": near-certain chance of victory

State	PVI^[2]	Incumbent	Last Election	Cook Nov 16, 2018^[3]
Alabama	R+14	Doug Jones	50.0% D	Lean D
Alaska	R+9	Dan Sullivan	48.0% R	Safe R
Arizona (Special)	R+5	Jon Kyl (Retiring)	—	Lean R
Arkansas	R+15	Tom Cotton	56.5% R	Safe R
Colorado	D+1	Cory Gardner	48.2% R	Lean R
Delaware	D+6	Chris Coons	55.8% D	Safe D
Georgia	R+5	David Perdue	52.9% R	Likely R
Idaho	R+19	Jim Risch	65.3% R	Safe R
Illinois	D+7	Dick Durbin	53.5% D	Safe D
Iowa	R+3	Joni Ernst	52.1% R	Safe R
Kansas	R+13	Pat Roberts	53.1% R	Safe R
Kentucky	R+15	Mitch McConnell	56.2% R	Likely R
Louisiana	R+11	Bill Cassidy	55.9% R	Safe R
Maine	D+3	Susan Collins	68.5% R	Lean R
Massachusetts	D+12	Ed Markey	61.9% D	Safe D
Michigan	D+1	Gary Peters	54.6% D	Safe D
Minnesota	D+1	Tina Smith	53% D	Likely D
Mississippi	R+9	TBD	—	Safe R
Montana	R+11	Steve Daines	57.9% R	Safe R
Nebraska	R+14	Ben Sasse	64.5% R	Safe R
New Hampshire	EVEN	Jeanne Shaheen	51.5% D	Safe D
New Jersey	D+7	Cory Booker	55.8% D	Safe D
New Mexico	D+3	Tom Udall	55.6% D	Safe D
North Carolina	R+3	Thom Tillis	48.8% R	Likely R
Oklahoma	R+20	Jim Inhofe	68.0% R	Safe R
Oregon	D+5	Jeff Merkley	55.7% D	Safe D
Rhode Island	D+10	Jack Reed	70.6% D	Safe D
South Carolina	R+8	Lindsey Graham	55.3% R	Safe R
South Dakota	R+14	Mike Rounds	50.4% R	Safe R
Tennessee	R+14	Lamar Alexander	61.9% R	Safe R
Texas	R+8	John Cornyn	61.6% R	Safe R
Virginia	D+1	Mark Warner	49.1% D	Safe D
West Virginia	R+19	Shelley Moore Capito	62.1% R	Safe R
Wyoming	R+25	Mike Enzi	72.2% R	Safe R

Race summary

Special elections during the preceding Congress

In this special election, the winner will serve as soon as they are elected and qualified.

State (linked to summaries below)	Incumbent			Results	Candidates
State (linked to summaries below)	Senator	Party	Electoral history	Results	Candidates
Arizona (Class 3)	Jon Kyl	Republican	1994 2000 2006 2012 (Retired) 2018 (Appointed)	Incumbent retiring.^[4] New senator will be elected.	TBD

Elections leading to the next Congress

In these general elections, the winners will be elected for the term beginning January 3, 2021. All of the elections involve the Class 2 seats; ordered by state.

State (linked to summaries below)	Incumbent			Results	Candidates
State (linked to summaries below)	Senator	Party	Electoral history	Results	Candidates
Alabama	Doug Jones	Democratic	2017 (Special)	Incumbent running.	Doug Jones (Democratic)
Alaska	Dan Sullivan	Republican	2014	Incumbent's intent unknown.	TBD
Arkansas	Tom Cotton	Republican	2014	Incumbent running.	Tom Cotton (Republican)^[5]
Colorado	Cory Gardner	Republican	2014	Incumbent's intent unknown.	Derrick Blanton (Democratic)^[6] Dustin Leitzel (Democratic)^[7]
Delaware	Chris Coons	Democratic	2010 (Special) 2014	Incumbent running.	Chris Coons (Democratic) Scott Walker (Republican)
Georgia	David Perdue	Republican	2014	Incumbent's intent unknown.	TBD
Idaho	Jim Risch	Republican	2008 2014	Incumbent's intent unknown.	TBD
Illinois	Dick Durbin	Democratic	1996 2002 2008 2014	Incumbent's intent unknown.	TBD
Iowa	Joni Ernst	Republican	2014	Incumbent's intent unknown.	TBD
Kansas	Pat Roberts	Republican	1996 2002 2008 2014	Incumbent's intent unknown.	Elliott Adams (Democratic)^[8]
Kentucky	Mitch McConnell	Republican	1984 1990 1996 2002 2008 2014	Incumbent running.	Steven Cox (Democratic)^[9] Mitch McConnell (Republican)^[10]
Louisiana	Bill Cassidy	Republican	2014	Incumbent's intent unknown.	TBD
Maine	Susan Collins	Republican	1996 2002 2008 2014	Incumbent's intent unknown.	Max Linn (Republican)^[11] Cathleen London (Democratic)^[12]
Massachusetts	Ed Markey	Democratic	2013 (Special) 2014	Incumbent running.	Ed Markey (Democratic)^[13]
Michigan	Gary Peters	Democratic	2014	Incumbent's intent unknown.	TBD
Minnesota	Tina Smith	Democratic	2018 (Appointed) 2018 (Special)	Incumbent's intent unknown.	TBD
Mississippi	TBD	TBD	2018 (Special)	Incumbent unknown; to be determined in the 2018 special election.	TBD
Montana	Steve Daines	Republican	2014	Incumbent's intent unknown.	TBD
Nebraska	Ben Sasse	Republican	2014	Incumbent's intent unknown.	TBD
New Hampshire	Jeanne Shaheen	Democratic	2008 2014	Incumbent's intent unknown.	TBD
New Jersey	Cory Booker	Democratic	2013 (Special) 2014	Incumbent running.	Cory Booker (Democratic)^[14]
New Mexico	Tom Udall	Democratic	2008 2014	Incumbent running.	Tom Udall (Democratic)^[15]
North Carolina	Thom Tillis	Republican	2014	Incumbent's intent unknown.	Eva F. Lee (Democratic)^[16]
Oklahoma	Jim Inhofe	Republican	1994 (Special) 1996 2002 2008 2014	Incumbent's intent unknown.	TBD
Oregon	Jeff Merkley	Democratic	2008 2014	Incumbent's intent unknown.	TBD
Rhode Island	Jack Reed	Democratic	1996 2002 2008 2014	Incumbent's intent unknown.	TBD
South Carolina	Lindsey Graham	Republican	2002 2008 2014	Incumbent's intent unknown.	TBD
South Dakota	Mike Rounds	Republican	2014	Incumbent's intent unknown.	TBD
Tennessee	Lamar Alexander	Republican	2002 2008 2014	Incumbent's intent unknown.	TBD
Texas	John Cornyn	Republican	2002 2008 2014	Incumbent running.	John Cornyn (Republican)^[17]
Virginia	Mark Warner	Democratic	2008 2014	Incumbent's intent unknown.	TBD
West Virginia	Shelley Moore Capito	Republican	2014	Incumbent's intent unknown.	TBD
Wyoming	Mike Enzi	Republican	1996 2002 2008 2014	Incumbent's intent unknown.	TBD

Alabama

Incumbent Democrat Doug Jones was elected in a special election in 2017, defeating Republican candidate Roy Moore. Jones will be up for re-election for a second term beginning January 3, 2021.

Alaska

One-term incumbent Republican Dan Sullivan was elected to a first term in 2014, defeating one-term incumbent Mark Begich.

Arizona (Special)

Six-term Republican senator John McCain died on August 25, 2018.^[18] Governor Doug Ducey was required by state law to appoint a new senator of the same party as McCain, and then the seat would be up for a special election in November 2020 and this will determine who serves the remainder of the term until January 3, 2023.^[19] On September 4, Governor Ducey appointed former Arizona senator Jon Kyl to fill McCain's vacancy. Kyl stated that he is only committed to serving until at least the end of the 115th United States Congress, and that he will not seek the seat again in 2020.^[20]

Arkansas

One-term incumbent Republican Tom Cotton was elected to a first term in 2014, defeating two-term incumbent Mark Pryor.

Colorado

One-term incumbent Republican Cory Gardner was elected to a first term in 2014, defeating one-term incumbent Mark Udall.

Derrick Blanton and pharmacist Dustin Leitzel are running for the Democratic nomination.^[6]^[7] Biomedical scientist Trish Zornio is exploring a run for the Democratic nomination.^[21]^[22] Other potential Democratic candidates include Boulder County District Attorney Stan Garnett.^[23]

Delaware

One-term Democrat Chris Coons was re-elected in 2014; Coons first took office after winning a 2010 special election, which occurred after long-time Senator Joe Biden resigned his seat to become Vice President of the United States.

Georgia

One-term incumbent Republican David Perdue was elected to a first term in 2014. He will be 70 on Election Day 2020.

Columbus Mayor Teresa Tomlinson is considering running for the Democratic nomination.^[24] Other potential Democratic candidates include 2018 gubernatorial nominee Stacey Abrams, State Representative Scott Holcomb, State Senator Jen Jordan, former Atlanta Mayor Kasim Reed and former Points of Light CEO and 2014 nominee Michelle Nunn.^[25]^[26]

Idaho

Two-term incumbent Republican Jim Risch was re-elected in 2014.

Illinois

Four-term incumbent and Senate Minority Whip Dick Durbin, a Democrat, was re-elected in 2014. Durbin will be 75 on Election Day in 2020, and has not yet indicated whether he will seek a fifth term. Potential Democratic candidates, should Durbin retire, are former IL Attorney General Lisa Madigan and Democratic Nominee for IL-13 in 2018, Betsy Dirksen Londrigan.

Potential Republican candidates include former Illinois Governor Bruce Rauner, U.S. Representatives Rodney Davis and Darin LaHood, and Republican Nominee for IL Attorney General in 2018 Erika Harold.

Iowa

One-term incumbent Republican Joni Ernst was elected to a first term in 2014.

Kansas

Four-term incumbent Republican Pat Roberts was re-elected in 2014, defeating independent candidate Greg Orman. Democrat Elliott Adams is running.^[8]

Kentucky

Six-term incumbent and Senate Majority Leader Republican Mitch McConnell was re-elected in 2014.

Democrat Steven Cox is running.^[9]

Louisiana

One-term incumbent Bill Cassidy was first elected in 2014, defeating three-term incumbent Mary Landrieu.

Maine

Four-term incumbent Republican Susan Collins was re-elected in 2014. Max Linn, the Reform nominee for Governor of Florida in 2006, Democratic candidate for Florida's 10th congressional district in 2008, and disqualified candidate for U.S. Senate from Maine in 2018, announced he is running.^[11] Physician and Maine Democratic Party State Committeewoman Cathleen London announced her candidacy.^[12] Zak Ringelstein, 2018 Democratic nominee for Maine's other Senate seat, announced in September 2018 that he would challenge Collins in 2020 if not already in office. He was defeated in 2018 by incumbent Angus King.^[27]

Massachusetts

One-term incumbent Democrat Ed Markey was re-elected in 2014; Markey first took office after winning a 2013 special election.

Michigan

One-term incumbent Democrat Gary Peters was elected to a first term in 2014.

Minnesota

This seat had been held by two-term incumbent Democrat Al Franken, but due to allegations of sexual misconduct, he resigned on January 2, 2018.^[28] A special election was held in 2018 to elect a senator to serve the remainder of Franken's term. Previously appointed Senator Tina Smith won the 2018 special election and is the incumbent senator in the seat.

Mississippi

Seven-term incumbent Republican Thad Cochran resigned April 1, 2018. Governor Phil Bryant appointed Republican Cindy Hyde-Smith to hold office until January 3, 2019. A November 2018 special election will determine Cochran's elected successor. No candidate garnered a majority of votes in the November 6, 2018 election; the top two candidates, Cindy Hyde-Smith and Democrat Mike Espy will continue to a runoff on November 27, 2018. The winner of that special election will serve the remainder of Cochran's term, which ends in January 2021.

Montana

One-term incumbent Republican Steve Daines was elected to a first term in 2014. Term-limited Governor Steve Bullock is a potential Democratic candidate.^[29]

Nebraska

One-term incumbent Republican Ben Sasse was elected to a first term in 2014.

New Hampshire

Two-term incumbent Democrat Jeanne Shaheen was re-elected in 2014.

New Jersey

One-term incumbent Democrat Cory Booker was re-elected in 2014; Booker first took office after winning a 2013 special election.

New Mexico

Two-term incumbent Democrat Tom Udall was re-elected in 2014.

North Carolina

One-term incumbent Republican Thom Tillis was elected to a first term in 2014, defeating one-term incumbent Kay Hagan. Tillis could also potentially run for Governor.^[30]^[31]

Former United States Secretary of Transportation and former Mayor of Charlotte Anthony Foxx may run.^[32] Tax attorney Eva Lee is running for the Democratic nomination.^[16]

Oklahoma

Four-term incumbent Republican Jim Inhofe was re-elected in 2014. Scott Pruitt may run for the seat if Inhofe retires.^[33]

Oregon

Two-term incumbent Democrat Jeff Merkley was re-elected in 2014.

Merkley may run for president and not for re-election to his Senate seat.^[34]

Rhode Island

Four-term incumbent Democrat Jack Reed was re-elected in 2014.

South Carolina

Three-term incumbent Republican Lindsey Graham was re-elected in 2014.

South Dakota

One-term incumbent Republican Mike Rounds was elected to a first term in 2014.

Tennessee

Three-term incumbent Republican Lamar Alexander was re-elected in 2014.

Texas

Three-term incumbent Republican John Cornyn was re-elected in 2014. He is running for re-election.^[17] U.S. Representative Joaquín Castro or his twin brother — Julian Castro, former U.S. secretary of housing and urban development and former Mayor of San Antonio — may challenge Cornyn.^[35]^[36] State Representative Rafael Anchia and U.S Representative Beto O'Rourke are also potential Democratic candidates.^[37]^[38]^[39]

Virginia

Two-term incumbent Democrat Mark Warner was re-elected in 2014.

West Virginia

One-term incumbent Republican Shelley Moore Capito was elected to a first term in 2014.

Wyoming

Four-term incumbent Republican Mike Enzi was re-elected in 2014. Congresswoman Liz Cheney may run again for the seat as a Republican.^[40]

Notes

^ Reflects the "classic" version of the forecast model.

References

^ Kondik, Kyle (October 5, 2017). "The Republican Senate Edge". Sabato's Crystal Ball. Retrieved April 11, 2018.
^ "2016 State PVI Changes – Decision Desk HQ". decisiondeskhq.com. December 15, 2017.
^ "Senate: 2020 Ratings & At-A-Glance". Cook Political Report. November 16, 2018.
^ Jonathan, Martin; Hakim, Danny. "Jon Kyl, Former Senator, Will Replace McCain in Arizona". The New York Times. Retrieved September 5, 2018.
^ "Sen. Cotton says he's running for reelection in 2020". Associated Press.
^ ^a ^b "BLANTON, DERRICK JAMES - Candidate overview - FEC.gov". FEC.gov.
^ ^a ^b "LEITZEL, DUSTIN JOHN - Candidate overview - FEC.gov". FEC.gov.
^ ^a ^b "ADAMS, ELLIOTT - Candidate overview - FEC.gov". FEC.gov.
^ ^a ^b "COX, STEVEN JEWELL ISOM - Candidate overview - FEC.gov". FEC.gov.
^ Beam, Adam. "McConnell announces re-elect campaign at Fancy Farm picnic". Associated Press.
^ ^a ^b Thistle, Scott (June 8, 2018). "Federal judge rejects Max Linn's effort to run in Maine Republican primary". Portland Press Herald. Retrieved June 8, 2018.
^ ^a ^b Dr Cathleen London [@DrChaya] (July 16, 2018). "I am running because #SCOTUS cannot wait @SenatorCollins needs to realize that Maine & the country are watching & she will be held accountable for her votes #mepolitics My announcement: https://www.doctorcatlondonforme.com/_api/media-share-server-for-video/crp5?instance-id=5f191a6c-020c-4fc6-9b82-2786411308cb&component-id=comp-jjog8axh&channel-id=2435a32f-3d87-4ae1-aac4-b8175b02e63c&video-id=b3603e263c0a42348786f1c1f8fe8d60&bi-token=8a23ff18-94ae-0e5a-0a87-60cb8863dede … @DrCat4ME" (Tweet) – via Twitter.
^ Guzman, Dan (October 5, 2018). "Markey Confirms Plans To Run For Re-Election In 2020". WBUR. Retrieved November 14, 2018.
^ Booker, Cory A. (November 21, 2014). "FEC FORM 2" (PDF). Federal Election Commission. Retrieved September 10, 2017.
^ Monahan, Joe (November 8, 2018). "Flip Flop: Xochitl Takes It Back From Yvette; Plus: R's Running On Empty; Blame Game Underway, The Many Women Of The House, Ben Ray's Climb, Transition Time And Dona Ana Clerk Chaos". New Mexico Politics with Joe Monahan. Retrieved November 14, 2018.
^ ^a ^b Adams, Matthew (August 11, 2017). "The election isn't until 2020, but Tillis has a challenger". The News & Observer. Retrieved August 31, 2017.
^ ^a ^b Patrick, Svitek (September 24, 2017). "John Cornyn says he's supporting Ted Cruz for re-election in 2018". The Texas Tribune. Retrieved September 24, 2017.
^ Tumulty, Karen. "John McCain, 'maverick' of the Senate and former POW, dies at 81". The Washington Post. Retrieved August 26, 2018.
^ "Who could be appointed to replace John McCain in the Senate, and the process behind it, explained". Vox. Retrieved August 26, 2018.
^ "Arizona governor names former Sen. Jon Kyl as McCain's replacement". CNN. Retrieved September 4, 2018.
^ Healy, Melissa (June 15, 2017). "Patricia Zornio, a biomedical researcher from a family of Trump supporters, hopes to stand up for science in the Senate". Los Angeles Times. Retrieved August 31, 2017.
^ Bunch, Joey (August 15, 2017). "Democrat Trish Zornio, scientist and community activist, weighing run against Gardner". Colorado Politics. Retrieved August 31, 2017.
^ Byars, Mitchell (July 7, 2017). "Boulder DA Stan Garnett won't run for Congress in 2018, but ponders 2020 Senate race". The Denver Post. Retrieved August 31, 2017.
^ Williams, Chuck (May 10, 2017). "Mayor Teresa Tomlinson makes decision on running for 2018 statewide office". Ledger-Enquirer. Retrieved May 10, 2017.
^ Bluestein, Greg (May 10, 2017). "Georgia 2018: Columbus mayor won't run for higher office next year". The Atlanta Journal-Constitution. Retrieved May 10, 2017.
^ Kyle Trygstad (December 8, 2014). "What's Next for Michelle Nunn?". Roll Call. Retrieved December 9, 2014.
^ Ringelstein, Zak [@RingelsteinME] (September 24, 2018). "If @SenatorCollins votes to confirm Brett Kavanaugh, I will make it my mission to defeat her in 2020, either as her colleague, or as her 2020 opponent. Chip in to help me stand up to Susan Collins and Brett Kavanaugh: https://secure.actblue.com/donate/zak_vs_collins# …" (Tweet) – via Twitter.
^ Seipel, Brooke (December 7, 2017). "Franken resigns in defiant floor speech".
^ Board, Post Editorial (August 7, 2015). "What are Bullock's Options?". Big Sky Words. Retrieved December 8, 2016.
^ "Is Thom Tillis running for governor? - Real Facts NC". realfactsnc.com.
^ "FOUR GOP candidates for NC governor in 2020?". dailyhaymaker.com.
^ Dunn, Andrew (October 26, 2016). "What's the next move for Anthony Foxx?". Charlotte Agenda. Retrieved May 8, 2018.
^ Hansler, Jennifer (March 3, 2018). "NYT: Pruitt eying potential future political office". CNN.
^ Redden, Jim. "Sources Say: Merkley confirms presidential aspirations". joomlakave.com. Retrieved October 1, 2017.
^ Whittaker, Richard (February 17, 2017). "Cruz or Cornyn vs. Castro or O'Rourke?". The Austin Chronicle. Retrieved June 12, 2017.
^ Tracy, Abigail (May 31, 2017). "Meet the Kennedyesque Democrat Trying to Beat Ted Cruz". Vanity Fair. Retrieved June 12, 2017.
^ "Twenty Faces to Watch in Politics by 2020". Houston Chronicle. April 16, 2009. Retrieved November 13, 2018.
^ Swartz, Mimi (November 7, 2018). "The Success in Beto's Failure". The New York Times. Retrieved November 7, 2018.
^ Henson, James (November 9, 2018). "Beto O'Rourke should run for Senate in 2020. He could win". The Washington Post. Retrieved November 13, 2018.
^ Hohmann, James (January 6, 2014) "Operatives: Liz Cheney could run again", Politico. Retrieved November 30, 2014.

[4] Reflects the "classic" version of the forecast model.

[kkondik1-1] Kondik, Kyle (October 5, 2017). "The Republican Senate Edge". Sabato's Crystal Ball. Retrieved April 11, 2018.

[2] "2016 State PVI Changes – Decision Desk HQ". decisiondeskhq.com. December 15, 2017.

[3] "Senate: 2020 Ratings & At-A-Glance". Cook Political Report. November 16, 2018.

[5] Jonathan, Martin; Hakim, Danny. "Jon Kyl, Former Senator, Will Replace McCain in Arizona". The New York Times. Retrieved September 5, 2018.

[6] "Sen. Cotton says he's running for reelection in 2020". Associated Press.

[Blanton-7] "BLANTON, DERRICK JAMES - Candidate overview - FEC.gov". FEC.gov.

[Leitzel-8] "LEITZEL, DUSTIN JOHN - Candidate overview - FEC.gov". FEC.gov.

[Adams-9] "ADAMS, ELLIOTT - Candidate overview - FEC.gov". FEC.gov.

[Cox-10] "COX, STEVEN JEWELL ISOM - Candidate overview - FEC.gov". FEC.gov.

[11] Beam, Adam. "McConnell announces re-elect campaign at Fancy Farm picnic". Associated Press.

[Linn-12] Thistle, Scott (June 8, 2018). "Federal judge rejects Max Linn's effort to run in Maine Republican primary". Portland Press Herald. Retrieved June 8, 2018.

[London-13] Dr Cathleen London [@DrChaya] (July 16, 2018). "I am running because #SCOTUS cannot wait @SenatorCollins needs to realize that Maine & the country are watching & she will be held accountable for her votes #mepolitics My announcement: https://www.doctorcatlondonforme.com/_api/media-share-server-for-video/crp5?instance-id=5f191a6c-020c-4fc6-9b82-2786411308cb&component-id=comp-jjog8axh&channel-id=2435a32f-3d87-4ae1-aac4-b8175b02e63c&video-id=b3603e263c0a42348786f1c1f8fe8d60&bi-token=8a23ff18-94ae-0e5a-0a87-60cb8863dede … @DrCat4ME" (Tweet) – via Twitter.

[14] Guzman, Dan (October 5, 2018). "Markey Confirms Plans To Run For Re-Election In 2020". WBUR. Retrieved November 14, 2018.

[15] Booker, Cory A. (November 21, 2014). "FEC FORM 2" (PDF). Federal Election Commission. Retrieved September 10, 2017.

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