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this page updated November 16, 2017

U.S. Senate Races, 2017-18               

  • Starting balance Nov. 7, 2017:  51R, 46D, 2I, 1v*.
  • 33 seats at stake in 2018:  23D, 8R, 2I.
  • 2 retirements:  2R.
  • 31 seeking re-election:  23D, 6R, 2I.
  • Balance after Nov. 6, 2018:  tbd.

*Special election in AL Dec. 12, 2017.

Party Committees:  DSCC  [Organization]   |   NRSC  [Organization]   |   FEC 
Key Super PACs:  D - Senate Majority PAC   |   R - Senate Leadership Fund

Alabama Special Election (Dec. 12, 2017)
Roy Moore (R)   |   Doug Jones (D)   |   Ron Bishop (L) w/in

Larry J. Sabato's Crystal Ball
The Cook Political Report

Overview
:
Of 33 seats at stake, 23 are held by Democrats and two others by Independents who caucus with the Democrats.  As Republicans are only defending eight seats, it seems likely they will be able to hold onto their majority. 

However, the Dec. 12, 2017 special election in Alabama is proving a big headache for Republicans.  Former Alabama Chief Justice Roy Moore defeated appointed Sen. Luther Strange (R) in the Sept. 26 primary.  Allegations of sexual misconduct surfaced in November, but Moore refused to withdraw.  Republican leaders posited all manner of scenarios, including running a write in candidate, possibly Strange or Attorney General Jeff Sessions; having Strange resign and hold a special election; and voting to expel Moore from the Senate if he is in fact elected.  Running for the Democrats is former U.S. Attorney Doug Jones;
the last Democrat to represent Alabama in the Senate was Sen. Howell Heflin, who retired in 1996.

The 2018 primaries will set the stage for the general election. 
Steve Bannon's threat to primary GOP senators who have not been sufficiently supportive of President Trump received a lot of attention, but observers question whether he will be able to field credible candidates.  On the Democratic side, Sen. Dianne Feinstein (CA) may face a competitive primary, and the corruption trial of Sen. Bob Menendez (NJ) could have an effect. 

For Republicans, the narrow majority in the Senate has proven difficult to work with; they would like to pick up some seats.  Although the political climate may make that difficult, there are a number of possibilities.  Ten of the Democrats represent states that voted for Trump in 2016, and five of those states are generally considered Republican (IN, MO, MT, ND and WV).  
Sen. Dean Heller (NV) is seen as most vulnerable Republican, and Democrats are also eying Arizona and Texas. 

Thus far only two senators have announced retirements, Republicans Bob Corker (TN) and Jeff Flake (AZ); there have also been a lot of rumors about Sen Orrin Hatch (UT).  Ten of the 23 Democrats and one of the eight Republicans seeking re-election are women.

2018

Primary
DEM. INCUMBENTS
CA
June 5
Dianne Feinstein
CT
Aug. 14
Chris Murphy
DE
Sep. 11
Tom Carper
FL
Aug. 28
Bill Nelson
HI
Aug. 11
Mazie Hirono
IN
May 8
Joe Donnelly
MD
June 26
Ben Cardin
MA
tbd.
Elizabeth Warren
MI
Aug. 7
Debbie Stabenow
MN
Aug. 14
Amy Klobuchar
MO
Aug. 7
Claire McCaskill
MT
June 5
Jon Tester
NJ
June 5
Bob Menendez
NM
June 5
Martin Heinrich
NY
Sep. 11
Kirsten Gillibrand
ND
June 12
Heidi Heitkamp
OH
May 8
Sherrod Brown
PA
May 15
Bob Casey Jr.
RI
Sep. 12
Sheldon Whitehouse
VA
June 12
Tim Kaine
WA
Aug. 7
Maria Cantwell
WV
May 8
Joe Manchin
WI
Aug. 14
Tammy Baldwin


Primary
IND. INCUMBENTS
ME
June 12
Angus King
VT
Aug. 14
Bernie Sanders



Primary
REP. INCUMBENTS
AZ
Aug. 28
Jeff Flake  ...retiring
MS
June 5
Roger Wicker
NE
May 15
Deb Fischer
NV
June 12
Dean Heller
TN
Aug. 2
Bob Corker  ...retiring
TX
Mar. 6
Ted Cruz
UT
Jun 26
Orrin Hatch
WY
Aug. 21
John Barrasso




Senate Primary Dates
Mar.

May
June

Aug.
Sept.
6-TX

8-IN
8-OH
8-WV
15-NE
15-PA
5-CA
5-MS
5-MT
5-NJ
5-NM
12-ME
12-NV
12-ND
12-VA*
28-MD
28-UT

2-TN
7-MI
7-MO
7-WA
11-HI
14-CT
14-MN
14-VT
14-WI
21-WY
28-AZ
28-FL
11-DE
11-NY
12-RI
none in Apr., July; tbd: MA             NCSL Primary Dates

 

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