Don't know and don't care.   As far as I could tell is that Democratic Party, favored Clinton, just as a private club will do.   It's their primary, did you expect Dem leaders and funding sources to support a 'wild card' like Bernie?   Get real.
 
Besides, they only had to beat Trump!   Shows how smart they were.

This has nothing to do with Trumps issues.   

The only thing that the two parties have in common is their mutual self interest in keeping the money flowing.