New Hampshire has a thing against income tax. It goes back many years. It's so strong that you could call it part of the unwritten NH constitution.
Now the Republicans have proposed a constitutional amendment to outlaw state income taxes in NH. Sort of making the unwritten constitution into a written on. The Democrats are objecting loudly.
These is a real good chance that the Republicans have the votes in both houses to pass it, and that the voters will approve it in November.