I think Clinton's ideal running mate (from a demographic standpoint) is a young, Catholic, Hispanic, male, so I could see Angel Taveras as Clinton's running mate if he wins the Rhode Island gubernatorial election. Anthony Brown and Cory Booker also could be decent VP candidates if they win in 2014. Obviously the problem with all three is that they are from Northeastern blue states.
I think Clinton would benefit from a running mate from a Western swing state. Maybe one of the Castro brothers would work if Clinton is willing to reach below senators and governors.
Alejandro Garcia Padilla might be a good candidate if Puerto Rico were a state.
Is there anything wrong with Salazar as VP or is he too old?