The only good thing about Trump getting the nomination would be the debates. I consider him unelectable in a general election (lord help us if I'm wrong.) but seeing the THRASHING that Sanders/Hilary would give him would make me happy.
And if it encourages people to vote blue for congress then so much the better.
Sanders and Hilary struggle in debates. The last Democrat debate really shocked me at how weak the Democrat line up was. They don't interact or debate very much just for one.