The 2012 United States presidential election in Massachusetts took place on November 6, 2012, as part of the 2012 United States presidential election in which all 50 states plus the District of Columbia participated. Massachusetts voters chose 11 electors to represent them in the Electoral College via a popular vote pitting incumbent Democratic President Barack Obama and his running mate, Vice President Joe Biden, against Republican challenger and former Massachusetts Governor Mitt Romney and his running mate, Congressman Paul Ryan.
Presidential primaries and caucuses of the Republican Party took place in many U.S. states, the District of Columbia, and five U.S. territories from February 3 to August 11, 2020, to elect most of the 2,550 delegates to send to the Republican National Convention. Delegates to the national convention in other states were elected by the respective state party organizations. The delegates to the national convention voted on the first ballot to select Donald Trump as the Republican Party's nominee for president of the United States in the 2020 election, and selected Mike Pence as the vice-presidential nominee.
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 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 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 Delaware Democratic presidential primary took place on July 7, 2020 alongside the New Jersey primary, as part of the Democratic Party primaries for the 2020 presidential election. It was originally going to take place on April 28, 2020 as one of several northeastern states in the "Acela primary", but was postponed due to the COVID-19 pandemic. The Delaware primary was a closed primary, with the state awarding 32 delegates to the 2020 Democratic National Convention, of which 21 were pledged delegates allocated on the basis of the primary results.
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 South Dakota 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 South Dakota primary was a semi-closed primary, with the state awarding 21 delegates to the 2020 Democratic National Convention, of whom 16 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.
Although American Samoa did not participate in the 2020 presidential election because it is a U.S. territory and not a state, it still participated in the U.S. presidential primaries and caucuses. Former mayor Michael Bloomberg won the Democratic caucus, held on March 3. The Republican caucus, in the form of a territorial convention held on March 18, endorsed incumbent President Donald Trump.
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.
Although the Northern Mariana Islands did not participate in the 2020 presidential election because it is a U.S. territory and not a state, it still participated in the U.S. presidential primaries and caucuses. Senator Bernie Sanders won the Democratic caucus, held on March 14, which would be his last win in the 2020 primary season. The Republican caucus, held on March 15 during the party's commonwealth convention, unanimously voted for incumbent President Donald Trump.
Although the United States Virgin Islands did not participate in the 2020 presidential election because it is a U.S. territory and not a state, it still participated in the U.S. presidential caucuses and primaries. Former vice president Joe Biden won the Democratic caucuses, held on June 6. The Republican caucuses, held on March 14 in the form of a territorial convention, voted for incumbent president Donald Trump.
Below is a detailed tally of the results of the 2020 Republican Party presidential primary elections in the United States. In most U.S. states outside New Hampshire, votes for write-in candidates remain untallied.
