If I were Harry Reid

If I were Harry, I would give McCain a phone call and lay it on the frickin line. "Senator McCain, what you are doing is destructive to an already deeply wounded country. It divides our country and it hurts. But let me make you a solemn vow Mr. Senator. In the offchance that you were to win this election, due to your actions, I will personally ensure that any agenda you have dies in the Senate. ANY and ALL Sir, nothing you propose will get past us. I will ensure that you are the lamest of lame ducks. Just so you know Mr. Senator. The Democrats are in power, and we WILL NOT forgive nor forget what kind of campaign you are running in these last weeks."

A statement like that requires balls and Harry doesn't have any.