35 races on the November 3, 2026 ballot. Republicans hold 53 seats and Democrats 45, with 2 independents who caucus with Democrats; 51 seats (or 50 plus the Vice President) control the chamber.
Open — Tuberville (R) running for governor
Solid R
R Barry Moore
REP · U.S. Representative
No recent public polls · No polls logged
No recent public poll logged. · Sabato: Safe R
D Mary Peltola
DEM · Former U.S. Representative
R Dan SullivanINC
REP · U.S. Senator since 2015
Recent polling available · Last poll: November 1, 2026
Logged poll: NYT/Siena, November 1, 2026: D 48 · R 46 · Sabato: Toss-up
R Tom CottonINC
REP · U.S. Senator since 2015
No recent public polls · No polls logged
No recent public poll logged. · Sabato: Safe R
D John HickenlooperINC
DEM · U.S. Senator; former governor
No recent public polls · No polls logged
No recent public poll logged. · Sabato: Safe D
D Chris CoonsINC
DEM · U.S. Senator since 2010
No recent public polls · No polls logged
No recent public poll logged. · Sabato: Safe D
Ashley Moody (R), appointed
Solid R
D Angie Nixon
DEM · State Representative
R Ashley MoodyINC
REP · Appointed senator; former Florida Attorney General
Recent polling available · Last poll: October 26, 2026
Logged poll: NYT/Siena, October 26, 2026: D 44 · R 50 · Sabato: Likely R
D Jon OssoffINC
DEM · U.S. Senator since 2021
R Mike Collins
REP · U.S. Representative
No recent public polls · Last poll: October 17, 2026
Logged poll: Quantus Insights, October 17, 2026: D 51.8 · R 44.9 · Sabato: Likely D
R Jim RischINC
REP · U.S. Senator since 2009
I Todd Achilles
IND · Independent; former state legislator
No recent public polls · No polls logged
No recent public poll logged. · Sabato: Safe R
Open — Dick Durbin (D) retiring
Solid D
D Juliana Stratton
DEM · Lieutenant Governor
R Don Tracy
REP · Former state GOP chair
No recent public polls · No polls logged
No recent public poll logged. · Sabato: Safe D
Open — Joni Ernst (R) retiring
Toss-up
D Josh Turek
DEM · State Representative
R Ashley Hinson
REP · U.S. Representative
Recent polling available · Last poll: November 1, 2026
Logged poll: NYT/Siena, November 1, 2026: D 48 · R 47 · Sabato: Lean D
R Roger MarshallINC
REP · U.S. Senator since 2021
Recent polling available · Last poll: November 1, 2026
Logged poll: NYT/Siena, November 1, 2026: D 49 · R 44 · Sabato: Lean R
Open — Mitch McConnell (R) retiring
Solid R
D Charles Booker
DEM · Former state representative
R Andy Barr
REP · U.S. Representative
No recent public polls · No polls logged
No recent public poll logged. · Sabato: Safe R
Bill Cassidy (R) lost primary
Solid R
R Julia Letlow
REP · U.S. Representative
No recent public polls · No polls logged
No recent public poll logged. · Sabato: Safe R
D Troy Jackson
DEM · Former Maine Senate President
R Susan CollinsINC
REP · U.S. Senator since 1997
Recent polling available · Last poll: November 1, 2026
Logged poll: NYT/Siena, November 1, 2026: D 51 · R 45 · Sabato: Lean D
D Ed MarkeyINC
DEM · U.S. Senator since 2013
R John Deaton
REP · Attorney
No recent public polls · Last poll: October 18, 2026
Logged poll: UMass Lowell, October 18, 2026: D 55 · R 26 · Sabato: Safe D
Open — Gary Peters (D) retiring
Toss-up
D Abdul El-Sayed
DEM · Physician; former Detroit health director
R Mike Rogers
REP · Former U.S. Representative
Recent polling available · Last poll: November 1, 2026
Logged poll: NYT/Siena, November 1, 2026: D 53 · R 42 · Sabato: Lean D
Open — Tina Smith (D) retiring
Lean D
D Peggy Flanagan
DEM · Lieutenant Governor
R Michele Tafoya
REP · Former sports broadcaster
Recent polling available · Last poll: November 1, 2026
Logged poll: AtlasIntel, November 1, 2026: D 48.1 · R 45.7 · Sabato: Likely D
D Scott Colom
DEM · District Attorney
R Cindy Hyde-SmithINC
REP · U.S. Senator since 2018
No recent public polls · No polls logged
No recent public poll logged. · Sabato: Safe R
Open — Steve Daines (R) retiring
Solid R
R Kurt Alme
REP · Former U.S. Attorney
I Seth Bodnar
IND · Independent; former University of Montana president
No recent public polls · No polls logged
No recent public poll logged. · Sabato: Safe R
R Pete RickettsINC
REP · U.S. Senator since 2023
I Dan Osborn
IND · Independent; union leader, no Democrat on ballot
Recent polling available · Last poll: October 29, 2026
Logged poll: YouGov, October 29, 2026: I 49 · R 49 · Sabato: Likely R
Open — Jeanne Shaheen (D) retiring
Toss-up
D Chris Pappas
DEM · U.S. Representative
R John E. Sununu
REP · Former U.S. Senator
Recent polling available · Last poll: November 1, 2026
Logged poll: AtlasIntel, November 1, 2026: D 52.3 · R 44.2 · Sabato: Lean D
D Cory BookerINC
DEM · U.S. Senator since 2013
No recent public polls · No polls logged
No recent public poll logged. · Sabato: Safe D
D Ben Ray LujánINC
DEM · U.S. Senator since 2021
No recent public polls · No polls logged
No recent public poll logged. · Sabato: Safe D
Open — Thom Tillis (R) retiring
Lean D
D Roy Cooper
DEM · Former Governor
R Michael Whatley
REP · Former RNC chair
Recent polling available · Last poll: November 1, 2026
Logged poll: AtlasIntel, November 1, 2026: D 56.4 · R 41.5 · Sabato: Likely D
Jon Husted (R), appointed
Toss-up
D Sherrod Brown
DEM · Former U.S. Senator
R Jon HustedINC
REP · Appointed senator; former Lt. Governor
Recent polling available · Last poll: November 1, 2026
Logged poll: NYT/Siena, November 1, 2026: D 49 · R 44 · Sabato: Lean D
Open — interim Sen. Alan Armstrong (R) not running
Solid R
D N'Kiyla Thomas
DEM · Nurse
R Kevin Hern
REP · U.S. Representative
No recent public polls · No polls logged
No recent public poll logged. · Sabato: Safe R
D Jeff MerkleyINC
DEM · U.S. Senator since 2009
R David Brock Smith
REP · State Senator
No recent public polls · No polls logged
No recent public poll logged. · Sabato: Safe D
D Jack ReedINC
DEM · U.S. Senator since 1997
No recent public polls · Last poll: October 11, 2026
Logged poll: Emerson, October 11, 2026: D 59 · R 25 · Sabato: Safe D
Darline Graham (R), appointed after Lindsey Graham's death
Lean R
D Annie Andrews
DEM · Pediatrician
R Darline GrahamINC
REP · Appointed senator; ex-commissioner, SC Commission for the Blind
Recent polling available · Last poll: October 26, 2026
Logged poll: NYT/Siena, October 26, 2026: D 48 · R 48 · Sabato: Lean R
R Mike RoundsINC
REP · U.S. Senator since 2015
Recent polling available · Last poll: October 21, 2026
Logged poll: Emerson College Polling, October 21, 2026: I 42 · R 50 · Sabato: Safe R
R Bill HagertyINC
REP · U.S. Senator since 2021
No recent public polls · No polls logged
No recent public poll logged. · Sabato: Safe R
John Cornyn (R) lost primary
Toss-up
D James Talarico
DEM · State Representative
R Ken Paxton
REP · Texas Attorney General
Recent polling available · Last poll: November 1, 2026
Logged poll: NYT/Siena, November 1, 2026: D 50 · R 43 · Sabato: Lean D
D Mark WarnerINC
DEM · U.S. Senator since 2009
No recent public polls · No polls logged
No recent public poll logged. · Sabato: Safe D
R Shelley Moore CapitoINC
REP · U.S. Senator since 2015
No recent public polls · No polls logged
No recent public poll logged. · Sabato: Safe R
Open — Cynthia Lummis (R) retiring
Solid R
R Harriet Hageman
REP · U.S. Representative
No recent public polls · No polls logged
No recent public poll logged. · Sabato: Safe R