As I've said before - I can see trump pulling in the 'anti-establishment' votes from the liberals as well as the conservatives.
He's not particularly conservative, which will enable even liberals to vote for him.
In some ways, running, and winning, as a republican is a masterstroke - he gains the support of everybody to the right of him, and is still encroaching on the left.
We're seeing a lot of Trump hate, but once Bernie loses, and it becomes yet another Establishment vs Non-Establishment contest, what's going to happen? There's lots of people pissed with the 'establishment', on both the right and the left. You know, the people making Animal House references, 'new boss same as old boss', and all that?