Yesterday, Rep. Barney Frank got in a heated exchange with a questioner at a Massachusetts Town Hall, who held up a poster of President Barack Obama overlaid prominently with a Hitler mustache. “Why do you continue to support a Nazi policy?” she demanded. His response: “On what planet do you spend most of your time?”

Great sound bite, but actually, it’s this one — and she shares it with LarouchePac, the political action committee run by Lyndon LaRouche. Which just happens to be mass-manufacturing those Obama-as-Hitler posters.

On what planet do you spend most of your time?”

Maybe that’s how to handle crazy Town Hall protesters: Call them on their crazy. Barney Frank did just that last night, in a moment from last night’s Town Hall in Dartmouth, Massachusetts that is all but designed to go viral.

When a woman stood up and compared President Barack Obama to Hitler, Frank responded: “It is a tribute to the First Amendment that this sort of vile, contemptible nonsense is so freely propagated.”