Vermont has open primaries. There is no party registration in Vermont. All registered voters can vote in the primary election—but can only vote on one ballot. You will be given a ballot for each of the major parties. You mark one of the ballots and put the remaining unvoted ballots into a discard bin. Which ballot you chose to vote is private and not recorded (except during the presidential primary, where voters must publicly take one ballot or the other, and their choice is recorded on the entrance checklist).