Can anything bring down Teflon Trump?

“If Chris Christie drops out, I’m not sure his support goes to Donald Trump. If Rand Paul drops out, I’m not sure his support goes to Donald Trump.”
 
Republican strategists echo that critique.
 
“How long do people like Rick Perry and Ted Cruz hold on to a few percent support?” Burnett pondered. “Does Trump have a lot of room to grow? I don’t think so. But I think Walker or Bush or [Florida Sen. Marco] Rubio have a lot of room to grow.”
 
Still others hold out hope that Trump might, in the end, deliver too deep a self-inflicted wound for even him to recover from.
 
“Some other candidate isn’t going to blow Donald Trump out of the water,” said Craig Robinson. “The only one who is going to take Donald Trump out of the water is Donald Trump.”