CHARLES KRAUTHAMMER: I think it is less important for its effect on Christie than it is on Trump. This is an extremely important endorsement for two reasons. Number one, it legitimizes Trump in a way that I think is going to be extremely crucial here. Trump has not been endorsed by anybody. He's been seen by --  

BRET BAIER (HOST): Couple of congressmen. Duncan Hunter, some others.

KRAUTHAMMER: Of whom no one has heard of outside the family. So Christie emerges, a guy who took the endorsement of The Union Leader in New Hampshire, there's a lot of argument there, and he endorses. It is an -- as A.B. said, he gave the keynote speech at the last convention. So there's a guy who represents the establishment, and in a sense what he does is he gives license to other senators, congresspeople and governors to go ahead and endorse. And I think there will be -- start with a trickle, but you will not be the first one and the one accused of opportunism. And the second was, the more short-term effect, is the genius of Trump in story and media management. This was going to be a day today and a weekend of people going over and over loops of the debate last night where Trump got wobbled, where he got pummeled with Rubio in the ring and Cruz leaning over the ropes from the outside, and hitting Trump in the back of the head. That was a dramatic debate yesterday. The story was stomped on today, it's taken over. It'll wear off, but it's going to have an effect of ending, at least over this weekend, that storyline that would have otherwise dominated. It would have been “Trump loses.” It's going to be now he wins Christie. 

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Chris Christie Endorses Donald Trump

Previously:

Chris Christie Calls Out A Fox & Friends Co-Host For “Rooting For Trump” On The Network

David Duke On His Support For Donald Trump: “On The Crucial Issues ... He's Right”

The Fox Primary For January: New Year, Same Trump Airtime Dominance