The vice president told the assembled crowd that he felt confident he and Obama would be reelected because Republicans had fully revealed their platform during the primary process.

"For the first time in my lifetime ... Republicans are not hiding the ball. No more compassionate conservatism. No more 'let's rebuild public education.' No more 'let's make sure everybody has access to healthcare.' No more. No more talk about women's equality and women's rights. No more. They're saying exactly what they believe. So I think the choice will be stark," Biden said.

Biden also joked that the pair would prevail because they "have the best candidate."

The vice president's son, Beau, will not face reelection until 2014, but there has been frequent speculation that the popular Delaware attorney general could seek higher office before then.