If they overtly dump Trump, they will likely lose the Senate also, as 13 million votes go elsewhere or stay home.
They are defending 24 Senate seats and the Dems 10. A swing of as few as 5 could send McConnell to the back of the chamber while the Dems take control of the Senate.
Add to that a Hillary presidency and it will be the start of a disaster. Likely, in 2018, they will also lose the House. That would give Hillary a full Congress. She would make Obama’s first 2 years of a full Congress look like child’s play.
Add in upwards of 5 Supreme Court justices, and the Dems could control the government for decades.
All because a few dozen sour-grapes establish Republicans are bent out of shape because one of ‘theirs’ did not get the nomination through the primary process.
I wonder if they will open the camps? Who would stop them?