As part of his advice to Romney, Christie said surrogates can only do so much to help the candidate. “I believe he’d be a very good president, but the fact of the matter is I’ve gotten to know him a lot better than you have.”

Christie delivered the keynote address last month at the Republican National Convention and has campaigned for Romney. He is to travel to Iowa, Washington, D.C., Utah and Missouri starting tomorrow on behalf of other candidates. There are no announced plans for Christie to stump for the presidential hopeful.

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