The time to stop Trump has long passed. If the GOP was serious about their party, they would have started trying to get him out of the race all the way back when he was insulting John McCain.
But................they, like most, thought that Trump would run out of steam and leave the race. Sadly enough, that didn't happen, and due to his fame from his television show, he took off like a rocket.
But then again, Americans are enamored with people who are famous, and they don't like politicians, which is why Trump took off so fast.
Nope, the time to stop him has long since passed, and yeah, he's going to be the GOP candidate. If not, then it will result in the destruction of the GOP.
Either way, they're screwed.