Biden: 'You’re the dullest audience I’ve ever spoken to'

He continued, saying, “You’re the dullest audience I’ve ever spoken to," at which point he got applause and laughs. "Do you realize how many jobs Wisconsin lost? It’s staggering!" 

Biden and President Obama have made frequent campaign stops in recent weeks in an attempt to jolt Democrats who are lagging Republicans in voter enthusiasm measures, in part due to the slowing pace of the economic recovery under the administration's watch. 

Biden's appearance Thursday was in the state capital of Madison, which hosted a crowd of 26,000 to see President Obama speak at rally targeted at young voters the week prior.

Obama, Biden to make first 2010 joint campaign appearance

The vice president has argued at previous events that Democrats have begun to reverse the momentum that had them sliding to large losses on Election Day. He has also taken several pointed shots at the GOP, jokingly saying this week that he would "strangle" Republicans who talk about the deficit. 

On Thursday, he took a jab at the House GOP's "Pledge to America," governing agenda.

“The pledge half baked … folks, we’ve been in that oven before," he said. "This pledge is a threat to America."