The Green Papers
2020 Presidential Primaries at a Glance


This "at a glance" look at the Presidential Primaries simply lists the winner (and, in many cases, the candidate who came in second) in each Primary in chronological order. It seems a quick method of discerning the progress of the eventual presidential nominee of the given Major Party (along with that of any significant challengers to that nominee) as the Primaries have progressed through time.

In fact, [presidential] primaries have been much more likely to sow division than unity, and most likely to leave things as they are [re: a potential consensus nominee identified prior to the earliest presidential primaries and caucuses]--
William R. Keech and Donald R. Matthews: The Party's Choice: Studies in Presidential Selection (Brookings Institution, 1977)

2020 Presidential Primaries at a Glance
Date State Democrat
 Link  Type Winner % Second %  Link  Type Winner % Second %
Tuesday 11 February 2020 New Hampshire NH-D   Sanders 26 Buttigieg 24 NH-R   Trump      
Saturday 29 February 2020 South Carolina SC-D   Biden 49 Sanders 20            
Tuesday 3 March 2020 Alabama AL-D   Biden L Sanders   AL-R   Trump      
Arkansas AR-D   Biden 40 Sanders 22 AR-R   Trump      
California CA-D   Sanders 34 Binden 27 CA-R   Trump      
Colorado CO-D   Sanders 37 Biden 25 CO-R   Trump      
Maine ME-D   Biden 34 Sanders 33 ME-R          
Massachusetts MA-D   Biden 34 Sanders 27 MA-R   Trump      
Minnesota MN-D   Biden 39 Sanders 30 MN-R   Trump U    
North Carolina NC-D   Biden 43 Sanders 24 NC-R   Trump      
Oklahoma OK-D   Biden 39 Sanders 25 OK-R   Trump      
Tennessee TN-D   Biden 42 Sanders 25 TN-R   Trump      
Texas TX-D   Biden 34 Sanders 30 TX-R   Trump      
Utah UT-D   Sanders 35 Biden 19 UT-R   Trump      
Vermont VT-D   Sanders 51 Biden 22 VT-R   Trump      
Virginia VA-D   Biden 53 Sanders 23            
Tuesday 10 March 2020 Democrats Abroad DA-D PR                    
Idaho ID-D   Biden 49 Sanders 43 ID-R   Trump      
Michigan MI-D   Biden D Sanders   MI-R   Trump      
Mississippi MS-D   Biden       MS-R   Trump      
Missouri MO-D   Biden D Sanders   MO-R   Trump      
Washington WA-D   Biden 38 Sanders 36 WA-R   Trump      
Tuesday 17 March 2020 Arizona AZ-D   Biden 44 Sanders 32            
Florida FL-D   Biden L Sanders   FL-R   Trump      
Illinois IL-D   Biden D Sanders   IL-R   Trump      
Saturday 4 April 2020 Wyoming WY-D PR Biden L Sanders              
Tuesday 7 April 2020 Wisconsin WI-D   Biden L Sanders   WI-R   Trump      
Saturday 11 April 2020 Alaska AK-D PR Biden D Sanders              
Tuesday 28 April 2020 Ohio OH-D   Biden L Sanders   OH-R   Trump U    
Saturday 2 May 2020 Kansas KS-D PR Biden                  
Tuesday 12 May 2020 Nebraska NE-D   Biden       NE-R   Trump      
Tuesday 19 May 2020 Oregon OR-D   Biden L Sanders   OR-R   Trump U    
Saturday 23 May 2020 Hawaii HI-D PR Biden L Sanders              
Tuesday 2 June 2020 District of Columbia DC-D   Biden       DC-R   Trump U    
Indiana IN-D   Biden       IN-R   Trump      
Maryland MD-D   Biden       MD-R   Trump      
Montana MT-D   Biden L Sanders   MT-R   Trump      
New Mexico NM-D   Biden L Sanders   NM-R   Trump      
Pennsylvania PA-D   Biden       PA-R   Trump      
Rhode Island RI-D   Biden L Sanders   RI-R   Trump      
South Dakota SD-D   Biden       SD-R   Trump P    
Friday 5 June 2020 Puerto Rico             PR-R          
Saturday 6 June 2020 Guam GU-D PR Biden L Sanders              
Tuesday 9 June 2020 Georgia GA-D   Biden       GA-R   Trump U    
West Virginia WV-D   Biden L Sanders   WV-R   Trump      
Tuesday 23 June 2020 Kentucky KY-D   Biden L Sanders   KY-R   Trump      
New York NY-D   Biden L Sanders   NY-R   Trump P    
Tuesday 7 July 2020 Delaware DE-D   Biden       DE-R   Trump      
New Jersey NJ-D   Biden       NJ-R   Trump U    
Saturday 11 July 2020 Louisiana LA-D   Biden       LA-R   Trump      
Sunday 12 July 2020 Puerto Rico PR-D   Biden L Sanders              
Tuesday 11 August 2020 Connecticut CT-D   Biden       CT-R   Trump      


  • PR indicates a Party-run Primary.

Circa, presumably, P

  • An unofficial date. An unconfirmed Presidential Primary established by currently-effective State statute or introduced bill; or- where the foregoing information could not be obtained- the state\'s prior delegate selection process and associated dates adjusted to the corresponding dates in the current year.


  • If a presidential contender wins 75.5% or more of the primary vote, the second place finisher is not listed.
  • U means that this presidential contender- or his/her delegate slate [depending on the type of Primary]- ran in the Primary unopposed (that is, with no other presidential contenders appearing on the ballot but him/her). Please note that write-ins do NOT count as such "other presidential contenders 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 presidential contender has failed to gain at least a majority of the primary vote, the winner of the primary and the contender who came in second are both listed with their respective percentages of the primary vote rounded up or down to the nearest whole integer.
  • P indicates Primary cancelled / nomination by default because nominee was the only presidential contender 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).

  Election 2020 - Presidential Primary, Caucus, and Convention Home  
  Presidential Candidates  
  States Alphabetically  
  Events Chronologically  
  Major Events Chronologically  
  Democratic "First Determining Step" Chronologically  
  Poll Closing Times Chronologically   --   Poll Closing Times Alphabetically  
  Chronological Cumulative Allocation of Delegates  
  Weekly Delegate Distribution and Availability  
Delegate Counts
  Democratic Pledged and Unpledged Summary   --   Republican Pledged and Unpledged Summary  
  Democratic Hard and Soft Summary   --   Republican Hard and Soft Summary  
  Democratic Hard and Floor Summary   --   Republican Hard and Floor Summary  
Commentary: THE TIES THAT BIND-- OR DO THEY? or, Politicus Unbound
Delegate Allocation
  Democratic Quick Reference   --   Republican Quick Reference  
  The Math Behind the Democratic Delegate Allocation   --   The Math Behind the Republican Delegate Allocation  
  Democratic Timing Penalties and Bonuses  
  Democratic Delegate Pledging and Voter Eligibility   --   Republican Delegate Selection and Voter Eligibility  
  Primaries at a Glance  
  Results Status and Date Retrieved  
  Estimating the Delegate Count  

  Historical Analysis of the Presidential Nominating Process  
  Historical Analysis of the apportionment of delegate votes at the National Conventions of the two major parties  
  Primary/Caucus/Convention Glossary  
  Statutory Election Information of the Several states / Presidential Primary  
  Dates of PRESIDENTIAL PRIMARIES re: selection and/or allocation/distribution of Delegates to Major Party National Conventions  
  Major Third Party Presidential Nomination Process  
  Straw Polls