Progressive Groups Targeting Julian Castro's HUD Record

[Likely Voter]

I still think one of the VA senators is more likely than Castro as they are safer picks and she probably doesn't need extra the Latino boost (and if she does, then Perez may be better anyway).   Are these groups going to go after other potential VPs?  Will they attack Kaine and Warner? Would Perez be liberal enough? (he is beloved by the unions).  Or will they go after anyone who isn't Sanders or Warren?