In a special post-debate “Kelly File,” Charles Krauthammer said Donald Trump’s opponents missed an opportunity to “slow down the Trump train.”

“If you were Cruz, Rubio or Kasich, I think it was an opportunity missed,” Krauthammer said. “I don’t think it’s going to be a turning point…in this campaign.”

Krauthammer said the debate gave the impression that those candidates had “run out of bullets.”

He said that Cruz was the candidate who engaged the most.