If you have been following New Hampshire politics this year, you know that House Bill 1264 became law. HB 1264 is intended to end the undemocratic practice of allowing out-of-state residents to vote in New Hampshire elections.
Once HB 1264 becomes effective the act of voting in New Hampshire will be deemed a declaration by the voter that he or she is a New Hampshire resident. This, obviously, will dissuade drive-by voting (which massively favors Democrats).
Note what I just wrote: “[o]nce HB 1264 becomes effective.”