The 2020 Massachusetts Democratic presidential primary took place on March 3, as one of 15 contests scheduled on Super Tuesday in the Democratic Party primaries for the 2020 presidential election, following the South Carolina primary the weekend before. The Massachusetts primary was a semi-closed primary, with the state awarding 114 delegates towards the 2020 Democratic National Convention, of which 91 were pledged delegates allocated on the basis of the results of the primary.
The 2020 Tennessee Democratic presidential primary took place on March 3, 2020, as one of 15 contests scheduled on Super Tuesday in the Democratic Party primaries for the 2020 presidential election, following the South Carolina primary the weekend before. The Tennessee primary was an open primary, with the state awarding 73 delegates towards the 2020 Democratic National Convention, of which 64 were pledged delegates allocated on the basis of the results of the primary.
The 2020 Utah Democratic presidential primary took place on March 3, 2020, as one of 15 contests scheduled on Super Tuesday in the Democratic Party primaries for the 2020 presidential election, following the South Carolina primary the weekend before. The Utah primary was an open primary, with any registered voter able to participate. The primary awarded 34 delegates towards the 2020 Democratic National Convention, of which 29 were pledged delegates allocated on the basis of the results of the primary.
The 2020 Louisiana Democratic presidential primary took place on July 11, 2020, a Saturday, in the Democratic Party primaries for the 2020 presidential election. It was originally planned for April 4 together with three other primaries, but was moved twice due to the COVID-19 pandemic. The Louisiana primary was a closed primary, with the state awarding 60 delegates, of which 54 were pledged delegates allocated on the basis of the results of the primary.
The 2020 Idaho Democratic presidential primary took place on March 10, 2020, as one of several states voting the week after Super Tuesday in the Democratic Party primaries for the 2020 presidential election. The Idaho primary required that voters would be registered Democrats or unaffiliated, and awarded 25 delegates towards the 2020 Democratic National Convention, of whom 20 were pledged delegates allocated on the basis of the primary results.
The 2020 Washington Democratic presidential primary took place on March 10, 2020, as one of several states voting the week after Super Tuesday in the Democratic Party primaries for the 2020 presidential election. The state-run semi-open primary, which was used instead of party-run caucuses for the very first time by Washington's Democrats, awarded 109 delegates to the 2020 Democratic National Convention, of which 89 were pledged delegates allocated according to the results of the primary.
The 2020 North Dakota Democratic presidential caucuses took place on March 10, 2020, as one of several states voting the week after Super Tuesday in the Democratic Party primaries and caucuses for the 2020 presidential election. While the contest has in effect been a party-run open primary for the first time in North Dakota's history, the state party retained the traditional caucus name, classifying it as a firehouse caucus. The state awarded 18 delegates to the 2020 Democratic National Convention, of which 14 were pledged delegates allocated on the basis of the results of the election.
The 2020 Alaska Democratic presidential primary had been scheduled to take place on April 4, 2020, in the Democratic Party primaries for the 2020 presidential election, but in-person voting was cancelled due to the COVID-19 pandemic and mail-in voting was extended to April 10, 2020. The Alaska primary was a closed party-run primary, with the state awarding 19 delegates to the 2020 Democratic National Convention, of which 15 were pledged delegates allocated on the basis of the results of the primary. Voters cast ranked-choice voting ballots, with a voter's ballot counting for four ranked backup choices if their original choice was in last place and below the 15 percent threshold for winning delegates.
The 2020 Hawaii Democratic presidential primary had been scheduled to take place on April 4, 2020, a Saturday, in the Democratic Party primaries for the 2020 presidential election, but in-person voting was cancelled due to the COVID-19 pandemic and mail-in voting was extended to May 22, 2020. Instead, voters had until May 22 to submit mail-in ballots. The Hawaii primary was a closed party-run primary, awarding 33 delegates to the 2020 Democratic National Convention, of which 24 were pledged delegates allocated on the basis of the results of the primary. Voters cast ranked-choice voting ballots, with a voter's ballot counting for two ranked backup choices if their original choice was in last place and below the 15 percent threshold for winning delegates.
The 2020 Rhode Island Democratic presidential primary took place on June 2, 2020, after being postponed due to concerns about the coronavirus pandemic, as one of eight delayed and regular primaries on the same day in the Democratic Party primaries for the 2020 presidential election. It was originally planned to take place on April 28, 2020, as one of several northeastern states in the "Acela primary". The Rhode Island primary was a semi-closed primary, with the state awarding 35 delegates, of whom 26 were pledged delegates allocated on the basis of the primary results.
The 2020 Kansas Democratic presidential primary took place until May 2, 2020, in the Democratic Party primaries for the 2020 presidential election, as in-person voting had been cancelled because of the COVID-19 pandemic. The Kansas primary was a closed party-run primary, undertaken completely by mail-in voting, it was the sole contest held on that date. The state awarded 45 delegates to the 2020 Democratic National Convention, of which 39 were pledged delegates allocated on the basis of the results of the primary. Voters cast ranked choice voting ballots, with a voter's ballot counting for four ranked backup choices if their original choice was in last place and below the 15 percent threshold for winning delegates.
The 2020 Indiana Democratic presidential primary had been scheduled to take place on May 5, 2020, but was postponed to June 2 due to the COVID-19 pandemic, alongside seven delayed and regular primaries on that day in the Democratic Party primaries for the 2020 presidential election. The Indiana primary was an open primary, with the state awarding 89 delegates to the 2020 Democratic National Convention, of whom 82 were pledged delegates allocated on the basis of the primary results.
The 2020 West Virginia Democratic presidential primary was held on June 9, 2020 alongside the Georgia primary, as part of the Democratic Party primaries for the 2020 presidential election. It was originally scheduled for May 12, 2020, but was moved to June 9 due to the COVID-19 pandemic. The West Virginia primary was a semi-closed primary, with the state awarding 34 delegates to the 2020 Democratic National Convention, of whom 28 were pledged delegates allocated on the basis of the primary results.
The 2020 Nebraska Democratic presidential primary took place on May 12, 2020, as part of the Democratic Party primaries for the 2020 presidential election. The Nebraska primary was a semi-closed primary and awarded 33 delegates to the 2020 Democratic National Convention, of which 29 were pledged delegates allocated on the basis of the results of the primary, and was the only contest on that date.
The 2020 Montana Democratic presidential primary took place on June 2, 2020, as one of eight delayed and regular primaries on the same day in the Democratic Party primaries for the 2020 presidential election. The Montana primary was an open primary, with the state awarding 25 delegates to the 2020 Democratic National Convention, of whom 19 were pledged delegates allocated on the basis of the primary results.
The 2020 New Jersey Democratic presidential primary took place on July 7, 2020 alongside the Delaware primary, as part of the Democratic Party primaries for the 2020 presidential election. It was originally planned for June 2 together with four other primaries, but was moved due to the COVID-19 pandemic. The New Jersey primary was a semi-closed primary, with the state awarding 146 delegates, of which 126 were pledged delegates allocated on the basis of the results of the primary.
The 2020 New Mexico Democratic presidential primary took place on June 2, 2020, as one of eight delayed and regular primaries on the same day in the Democratic Party primaries for the 2020 presidential election. The New Mexico primary was a closed primary, with the state awarding 46 delegates to the 2020 Democratic National Convention, of whom 34 were pledged delegates allocated on the basis of the primary results.
The 2020 District of Columbia Democratic presidential primary took place on June 2, 2020, as one of eight delayed and regular contests on that day in the Democratic Party primaries for the 2020 presidential election. The District of Columbia primary was a closed primary, with the district awarding 45 delegates to the 2020 Democratic National Convention, of whom 20 were pledged delegates allocated on the basis of the results of the primary.
The 2020 Maine Democratic presidential primary took place on March 3, 2020, as one of 15 contests scheduled on Super Tuesday in the Democratic Party primaries for the 2020 presidential election, following the South Carolina primary the weekend before. The Maine primary, the first in the state since 2000, was a closed primary, meaning that only registered Democrats could vote in this primary, but unenrolled voters were permitted to enroll in a party at the polls with same day registration. The state awarded 32 delegates towards the 2020 Democratic National Convention, 24 of which were pledged delegates allocated based on the results of the primary. The primary election coincided with a people's veto referendum to reject changes to Maine's vaccination laws.
The 2020 Wyoming Democratic presidential caucuses had been scheduled to take place on April 4, 2020 in the Democratic Party primaries and caucuses for the 2020 presidential election, but in-person voting was cancelled due to the COVID-19 pandemic and mail-in voting was extended to April 17, 2020. The Wyoming caucuses were a closed caucus, with the state awarding 18 delegates to the 2020 Democratic National Convention, of which 14 were pledged delegates allocated on the basis of the results of the caucus. Voters cast ranked-choice voting ballots, with a voter's ballot counting for four ranked backup choices if their original choice was in last place and below the 15 percent threshold for winning delegates.
