I know a hell of a lot of them moved up there. Same thing with the once great state of Maine. For years and years there was a national migration of liberal idiots moving from all over the county to Maine.
Now, the state is in shambles. A total joke.
The reddest counties in NH are on the MA border. Most of the folks I know who have moved up from MA are refugees.
The bluest counties are along the VT border, where the locusts from NY, having wrecked VT, are invading (there and in the college towns, where lots of non-residents vote illegally).