Or, because the election outcome in their home state of Vermont, New York, or Massachusetts was a already a certain victory for the Democrat Party, they decided to illegally cast their fraudulent vote in New Hampshire, instead. These people should be hunted down, prosecuted, heavily fined, imprisoned, and permanently lose their right to vote ever again.
Voting is not only a right ... it is a personal responsibility. It takes very little time and effort to register in advance ... so the registrar has plenty of time to check you out and make sure you are legit (at least 6 months before the election sounds about right to me) ... and if you miss the deadline ... oh well, that's on you ... just make sure you're registered in time for the next election. Also, as part of your personal responsibility as a legitimate voter, it is incumbent upon you to bring and show proper identification to prove who you say you are before you cast your vote. This is simply common sense ... but, of course, leftists do not believe in personal responsibility, so such common sense is abhorrent to them.
The essential American soul is hard, isolate, stoic, and a killer. It has never yet melted. ~ D.H. Lawrence