Not in NH! Heck, I've voted in every election since I moved here in 1999 and while some campaigners can be annoying, they are allowed to stand right next to the door- usually opening it for voters while pitching their candidate.
Often seen inside the polling place are people wearing t-shirts, hats, buttons & etc... for their candidate of choice. Me? I'm Ron-Pauling my voting place tomorrow and so are my kids. Freedom of speech! It ain't the Live Free or Die state for nothing!