President Barack Obama’s support for the Occupy Wall Street movement appeared to backfire on him Tuesday, as hecklers interrupted a speech in which the president portrayed himself as a champion of the middle class fighting against Republicans who care only about the wealthy.

The president had just begun his speech at Manchester Central High School in New Hampshire early Tuesday afternoon when one of the protesters shouted: “Mic check!”

That appeared to be the cue for the Occupy crowd, whose indeterminate agenda has led some pundits to label them anarchists, to disrupt the event.

A dozen or more protesters shouted in unison: “Mr. President . . . over 4,000 peaceful protesters . . . have been arrested.”