I'm thinking it could be Cory Booker. He has the same qualifications as Castro, except he's black.
I don't think so.
The Democrats are so over confident that they have all of the black voters locked into the Democrat plantation that they feel free to import millions of Mexicans to vote Democrat, even though they are taking jobs away from any poor blacks that still might want to work.
I think Hillary is going to pick a Mexican VP to motivate all those new undocumented Democrats to illegally vote for her.