Rooting for Deval Patrick. He's unquestionably qualified, would make an excellent attack dog, and it completely rewards African Americans, who are probably the main reason Hillary was able to put the nomination away.
Will never be him...
1. He doesn't want it
2. Clinton won't pick him because this actually would cause more Berners to say #BernieorBust (he's at Bain Capital!)
Booker could also have a similar problem when it comes to the Berners. He defended Bain Capital in 2012 after all...
Warner's time has gone, surely?
I would agree.
Furthermore I also think Castro is unlikely because it would start a debate about his experience at a time that the Clinton campaign propably wouldn't need it.