Who Will Be Hillary Clinton's Vice President? Why Martin O'Malley Might Be Running For Second Slot On Clinton's Ticket

On the campaign trial, Martin O'Malley has not been hesitant to launch attacks against Hillary Clinton, but while on stage at the first Democratic debate Tuesday, the former Maryland governor appeared amicable toward the party's front-runner. His demeanor raised the question: Is O'Malley vying to join the 2016 Clinton ticket?