In many states, voting in a party primary is restricted to people who have chosen their party in advance, sometimes well in advance. But in New Hampshire, the laws are incredibly permissive.
- You can register to vote in New Hampshire and vote in the primary the same day.
- You can "move" to New Hampshire, declare your "domicile," and vote -- all on Primary Day.
- You can declare your party affiliation -- on Primary Day.
- After Primary Day, you can immediately un-affiliate by declaring you want to leave the party, just by filling out a form.
Eric Dixon is a New York lawyer.