You can’t switch parties in NH any more on primary day.
In fact, you had to do it this year some time in October last year.
It didn’t always work out, though. In 2008 I walked in a Republican, switched to Democrat, voted for Obama, walked over and switched back to GOP, and walked out.
I figured Obama was the one Democrat with no chance of winning.
I remember explaining to my father that Obama was not a concern, because he had no chance of winning. He had little name recognition, had little to stand on in his history as a Senator, he was the farthest Left and was a radical on abortion, and his only asset was his skin tone. Pay him no mind.
Ugh. Being THAT wrong does suck.