The Green Papers
2020 Senatorial Primaries at a Glance


This "at a glance" look at the primary in each State simply lists the winner (and, in many cases, the candidate who came in second) in each Primary in chronological order.

boldface followed by (inc) indicates the incumbent

2020 Senatorial Primaries at a Glance
Date State Democrat
R Winner % Second % R Winner % Second %
Tuesday 3 March 2020 Alabama   Jones (inc) P       Tuberville 34% to Sessions 32% poceed to 31 March 2020 Runoff
Arkansas             Cotton (inc) P    
North Carolina   Cunningham D Smith     Tillis (inc)      
Texas   Hegar 22% v West 15% proceed to 26 May 2020 Runoff   Cornyn (inc)      
Tuesday 10 March 2020 Mississippi   Espy         Hyde-Smith (inc) U    
Tuesday 17 March 2020 Illinois   Durbin (inc) U       Curran 41 Hubbard 23
Tuesday 31 March 2020 Arkansas R         R        
Tuesday 12 May 2020 Nebraska   Janicek 31 Philips 24   Sasse (inc)      
Tuesday 19 May 2020 Idaho   Jordan         Risch (inc) U    
Oregon   Merkley (inc) U       Perkins 50 Romero 31
Tuesday 2 June 2020 Iowa   Greenfield 48 Franken 25   Ernst (inc) U    
Montana   Bullock         Daines      
New Mexico   Lugen U       Ronchetti D Martinez  
South Dakota   Ahlers P       Rounds (inc) L Borglum  
Tuesday 9 June 2020 Georgia   Ossoff N Tomlinson     Perdue (inc) U    
South Carolina   Harrison P       Graham (inc) L LaPierre  
West Virginia   Swearengin 38 Ojeda 33   Capito (inc)      
Tuesday 23 June 2020 Kentucky   McGrath 45 Booker 43   McConnell (inc)      
Mississippi R         R        
North Carolina R         R        
South Carolina R         R        
Virginia   Warner (inc) P       Gade L Baldwin  
Tuesday 30 June 2020 Colorado   Hickenlooper D Romanoff     Gardner (inc) U    
Oklahoma   Broyles D Britt     Inhofe (inc) L Stitt  
Tuesday 7 July 2020 New Jersey   Booker (inc) U       Mehta 40 Singh 34
Tuesday 14 July 2020 Alabama R         R Tuberville L Sessions  
Maine   Gideon L Sweet     Collins (inc) U    
Texas R Hegar N West   R        
Tuesday 4 August 2020 Arizona   Kelly U       McSally (inc)      
Kansas   Bollier         Marshall 40 Kobach 26
Michigan   Peters (inc) U       James U    
Thursday 6 August 2020 Tennessee   Bradshaw 36 Kimbrough 26   Hagerty N Sethi  
Tuesday 11 August 2020 Georgia R         R        
Minnesota   Smith (inc)         Lewis      
South Dakota R         R        
Tuesday 18 August 2020 Alaska   Gross L Howe     Sullivan (inc) U    
Wyoming   Ben-David 41 Ludwig 21   Lummis D Short  
Tuesday 25 August 2020 Oklahoma R         R        
Tuesday 1 September 2020 Massachusetts   Markey (inc) D Kennedy     O'Connor D Ayyadurai  
Tuesday 8 September 2020 New Hampshire   Shaheen (inc)         Messner N Bolduc  
Rhode Island   Reed (inc) U       Waters U    
Tuesday 15 September 2020 Delaware   Coons (inc)         Witzke D DeMartino  
Tuesday 3 November 2020 Louisiana                    
Saturday 5 December 2020 Louisiana                    


  • If a candidate wins 75.5% or more of the primary vote, the second place finisher is not listed.
  • U means that this candidate ran in the primary unopposed (that is, with no other candidates appearing on the ballot but him/her). Please note that write-ins do NOT count as such "other candidates on the ballot" but the appearance of "Uncommitted" (or equivalent, such as "None of the Above") on a ballot DOES.
  • L indicates a landslide majority [60.5 to 75.4% of the primary vote] for the winner.
  • D indicates a decisive majority [52.5 to 60.4% of the primary vote] for the winner.
  • N indicates a narrow majority [50.0(+1 vote) to 52.4% of the primary vote] for the winner.
  • Where a winning (or, in a runoff State, leading) candidate has failed to gain at least a majority of the primary vote, the winner(leader) of the primary and the candidate who came in second are both listed with their respective percentages of the primary vote rounded up or down to the nearest whole integer.
  • C indicates the Party's nominee was chosen by a Party-run process other than the Primary (State Convention, Party Central Committee or equivalent).
  • P indicates Primary cancelled / nomination by default because nominee was the only candidate to have filed for this Party's Primary for this office. P also applies to nominees-to-be by apparent Party consensus (i.e. no opposition at an ensuing Convention).
  • R indicates any Runoff which has been scheduled for this date.

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