Closed Primary Election
Florida is a closed primary state. This means only voters who are registered members of political parties may vote for respective party candidates or nominees in a primary election, including a presidential preference primary election. A person can register with a party or change his or her party affiliation any time, but to vote for a party candidate in a primary election, one must register or change party before the voter registration deadline, which is the 29th day before an election. Once the registration books are closed for an election, new registrations and party changes will be accepted but only for the purpose of future elections. See section 97.055, Fla. Stat.
Universal Primary Contest
There is, however, an exception to the closed primary rule. When all the candidates for an office in a primary election are of the same party and the winner of the primary will have no opposition in the general election, all electors, regardless of party affiliation, are eligible to vote in the primary for that office. This is called a Universal Primary Contest.
Presidential Preference Primary
The Presidential Preference Primary (PPP) is part of the presidential nominating process for Florida's two major political parties and is a closed primary. Voters registered with one of the two major parties -- the Florida Democratic Party (DEM) and the Republican Party of Florida (REP) -- may vote in their respective primary for the candidate of their choice to represent their party in the General Election in November. Florida's presidential preference primary is held on the third Tuesday in March in a presidential election year.
Note: Local nonpartisan elections may be held at the same time as the PPP. All eligible voters can vote in those local elections.