Why should Trump support a GOP nominee who is a POS? I won't ever again hold my nose to vote for a GOP candidate I know isn't good for America, and is going to stab me in the back down the road. I'd rather sit home on Election Day, rather than continue the bad habit of supplying Rinos to an already severely infected Congress.
I take the view that any GOPer, even Trump, would be better than the Dem (my guess, Moochelle) nom, and I'll vote accordingly.
That said, I know GOPers (my DW included) who are so infuriated by Trump's foolish behaviors, that they decline to vote for him.
Trump has no chance in the general, I wish I had better news.