Comment by sam1714

>Vote... where? In what state, in what county, in what precinct?

No, you misunderstood the comment. It has nothing to do with residency, that's solved.

During a normal election year in the US, you have two elections: a primary and a general. The primary is not solely for political party nominations either, often other state and municipal questions get put on it.

Some places commonly end up getting a 3rd because, e.g. a senate seat becomes vacant and the state has a requirement to hold a vote on the replacement. Sometimes the seat becomes vacant as a result of taking a position in the new administration, so you end up having 3 elections a couple of months apart.