Chris Christie: “He said that he was going to repeal and replace Obamacare. And even with a Republican Congress, he failed.”

if you can't say the former president is unfit, you're unfit yourself.

I don't think so. And, look, I did this, as you know, for seven years as the U.S. attorney in the fifth-largest office in the country.

Mr. Trump has the opportunity to rein in some of the worst rhetorical impulses of the Republican Party.

It makes this debate really crucial. It's an amazing timing by him, because it is a race for second in Iowa.