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New Jersey Gov. Chris Christie explained "On The Record" tonight that he endorsed Donald Trump for president because the billionaire businessman has the best chance to beat Hillary Clinton and give our country the strong leadership we need.

Christie said that first-term Senators Ted Cruz and Marco Rubio are ill-prepared to take on the job of president of the United States, and Trump is the best remaining GOP candidate.

"Politics is about choosing. I made a choice. I'm proud of my choice," Christie said.

He said now he's focused on doing everything he can to help his friend secure the Republican nomination and defeat Clinton in the general election.

Watch more above.

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