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Republican presidential candidate Donald Trump smiles as he stands with New Jersey Gov. Chris Christie before a rally in Fort Worth, Texas, Friday, Feb. 26, 2016. (AP Photo/LM Otero)
Republican presidential candidate Donald Trump smiles as he stands with New Jersey Gov. Chris Christie before a rally in Fort Worth, Texas, Friday, Feb. 26, 2016. (AP Photo/LM Otero)

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    Trump unveils big get: Gov. Chris Christie

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Trump unveils big get: Gov. Chris Christie

CNN's Sara Murray reports.

Trump unveils big get: Gov. Chris Christie

CNN's Sara Murray reports.