If you are a registered voter who is enrolled in either the Democratic or Republican parties, you can cast your vote for your favorite presidential candidate on Tuesday, March 3, 2020.
If you are not registered to vote (but are 18 or older and a U.S. Citizen) you may register to vote in person at your town office, even on the day of the primary. You are not able to change your party affiliation on the day of the primary.