Each of the 50 U.S. states, the District of Columbia, and territories of the United States holds either primary elections or caucuses to help nominate individual candidates for president of the United States. This process is designed to choose the candidates that will represent their political parties in the general election.
From January 19 to June 8, 2004, voters of the Republican Party chose its nominee for president in the 2004 United States presidential election. Incumbent President George W. Bush was again selected as the nominee through a series of primary elections and caucuses culminating in the 2004 Republican National Convention held from August 30 to September 2, 2004, in New York City.
From January 3 to June 3, 2008, voters of the Republican Party chose their nominee for president in the 2008 United States presidential election. Senator John McCain of Arizona was selected as the nominee through a series of primary elections and caucuses culminating in the 2008 Republican National Convention held from Monday, September 1, through Thursday, September 4, 2008, in Saint Paul, Minnesota. President George W. Bush was ineligible to be elected to a third term due to the term limits established by the 22nd Amendment.
From January 3 to June 5, 2012, voters of the Democratic Party chose its nominee for president in the 2012 United States presidential election. President Barack Obama won the Democratic Party nomination by securing more than the required 2,383 delegates on April 3, 2012, after a series of primary elections and caucuses. He was formally nominated by the 2012 Democratic National Convention on September 5, 2012, in Charlotte, North Carolina.
This article includes the entire 2016 Democratic Party presidential primary schedule in a format that includes result tabulation. Below are the vote totals for everyone that appeared on the ballot during the 2016 Democratic presidential primaries. Two candidates, Bernie Sanders and Hillary Clinton, appeared on all 57 ballots. Two others, Martin O'Malley and Rocky De La Fuente, appeared in over 30 states and six others appeared on between two and ten states. Nearly 20 appeared on only New Hampshire's ballot. As of June 8, Hillary Clinton was considered the presumptive nominee according to media organizations. On July 26, the second day of the Democratic National Convention, Clinton was confirmed the Democratic nominee for the 2016 United States presidential election.
Although Puerto Rico did not participate in the November 8, 2016, general election because it is a territory and not a state, the five non-incorporated territories that send delegates to the United States House of Representatives participated in the presidential primaries.
Although Puerto Rico does not participate in U.S. presidential general elections because it is an unincorporated territory and not a state, and therefore cannot send members to the U.S. Electoral College, Puerto Ricans are citizens of the United States and do participate in the U.S. presidential primaries.
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.
The 2000 Illinois Republican presidential primary was held on March 21 in the U.S. state of Illinois as one of the Republican Party's statewide nomination contests ahead of the 2000 presidential election. 74 delegates to the 2000 Republican National Convention were allocated to the presidential candidates.
Although Guam 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 vice president Joe Biden won the Democratic caucus, held on June 6. The Republican caucus, held on March 14 in the form of a "state convention", endorsed incumbent President Donald Trump.
The 2004 Rhode Island Republican presidential primary was held on March 2, 2004, as part of the 2004 Republican Party primaries for the 2004 presidential election. 18 delegates to the 2004 Republican National Convention were allocated to the presidential candidates.
The 2004 Oregon Republican presidential primary was held on May 18, 2000, as part of the 2004 Republican Party primaries for the 2004 presidential election. 28 delegates to the 2004 Republican National Convention were allocated to the presidential candidates. The contest was alongside the Kentucky primary and Arkansas primary.
The 2000 Texas Republican presidential primary was held on March 14, 2000, as part of the 2000 presidential primaries for the 2000 presidential election. 124 delegates to the 2000 Republican National Convention were allocated to the presidential candidates, the contest was held alongside primaries in Florida, Louisiana, Mississippi, Oklahoma and Tennessee.
The 2000 Alaska Democratic presidential caucuses were held on April 22, 2000, as part of the 2000 presidential primaries for the 2000 presidential election. 13 delegates to the 2000 Democratic National Convention were allocated to the presidential candidates.
The 2000 American Samoa Democratic presidential caucuses were held on March 7, 2000, as part of the 2000 Democratic Party primaries for the 2000 presidential election. 3 delegates to the 2000 Democratic National Convention were allocated to the presidential candidates, the contest was held on Super Tuesday alongside primaries and caucuses in 15 other states.
The 2000 American Samoa Republican presidential caucuses were held on February 26, 2000, as part of the 2000 Republican Party primaries for the 2000 presidential election. 4 delegates to the 2000 Republican National Convention were allocated to the presidential candidates, the contest was held alongside primaries in Guam and the Virgin Islands.
Although American Samoa will not participate in the 2000 presidential election because it is a U.S. territory and not a state, it participated in the U.S. presidential primaries and caucuses for both the Democratic and Republican parties.
The 2000 U.S. Virgin Islands Democratic presidential caucuses were held on April 1, 2000, as part of the Democratic Party primaries for the 2000 presidential election. 6 delegates to the Democratic National Convention will be allocated to presidential candidates.
The 2000 Puerto Rico Democratic presidential caucuses were held on April 2, 2000, as part of the Democratic Party primaries for the 2000 presidential election. 58 delegates to the Democratic National Convention were allocated to presidential candidates.
The 2000 Puerto Rico Republican presidential primary was held on February 27, 2000, as part of the Republican Party primaries for the 2000 presidential election. 14 delegates to the Republican National Convention were allocated to presidential candidates.
