Trump will bring out the voters like he has in all of the record setting primaries/Caucasus.
Dems will laugh him off and not vote in the GE as its already been ingrained a long time ago that Hillary will win, and will point to trends and statistical history as to why Trump won't win despite him breaking every singe "rule" of this election when it comes to forecasting.
Boom, President Trump.
Look at Trumps unfavorables. A Trump nomination inspires Democrats to vote IMO (especially minorities), not depresses them.