Battle between Christie and teachers unions gets tougher in New Jersey.

"I believe the teachers in New Jersey in the main are wonderful public servants that care deeply. But their union, their union are a group of political thugs," Christie said.

Christie also spoke about Donald Trump's political dabbling.

"Donald's a really good friend of mine. I don't know that Donald really wants to be President," he said. "We've spoken about it, and all I can say to you is that, you know, I'll believe it when I see it," Christie said.