"Sloppy Chris Christie is not fit to run for President. He is suffering from Trump Derangement Syndrome," Trump wrote. "According to all, he came in LAST in the debate, and I came in FIRST, as I have in all of the debates, without even being there. MAGA!"

Former N.J. Gov. Chris Christie discussed his 2024 presidential campaign, former President Donald Trump and more on "Face the Nation" Sunday.

Former President Donald Trump slammed former New Jersey Gov. Chris Christie for how he performed in the fourth GOP presidential debate.

Not saying Mr Trump’s name — or at least not invoking it critically as Mr Christie has been wont to do since launching his quixotic bid to deny the ex-president the GOP nomination — is a matter of basic self-preservation.

Chris Christie kicked off a two-day New Hampshire college tour following the most recent GOP debate, going to campuses to try to grow the anti-Trump Republican coalition.