How do I register to vote for my state’s presidential primary or caucus?

It depends. Some states hold open primaries that are open to all registered voters, others hold closed primaries that require you are pre-registered with the party some time before the general voter registration deadline, and still others will allow unaffiliated voters to select a party on election or caucus day. The best way to ensure your participation is to visit the HeadCount Voter Info Hub to view your state’s specific requirements.