Yesterday's New York Times had an interesting article about what motivated Donald Trump to run for President. Much of his motivation apparently came from the need to be taken seriously, and even the need to belong.
Part of the article was how the Republican Party reacted to his increasing activity within the party from 2011-2015. Mainly, no one took Trump seriously when he began this involvement. Even after it became evident he was interested in the Presidency, he was essentially patronized and not taken seriously.
There must be plenty of Republican Party big wigs and operatives who regret this now. Wherever they are, they aren't talking.
It's not too late to stop Trump. In fact, with all these recent episodes of violence, I can hardly imagine any responsible Republican defending him, much less campaigning for him.