If you like John Kasich, it's time to celebrate! The Ohio governor finally won a primary – his home state’s. Of course, he flopped in last week's other contests, ending the evening with almost two dozen fewer delegates than Sen. Marco Rubio, who exited the GOP race. Kasich’s campaign has bordered on the bizarre. He has survived for two reasons: First, he has refused to get out, no matter how badly he has done. And second, he has been so irrelevant that nobody attacked him, leaving him generally unscathed in a race where there is plenty of blood on the...