(CNN) – Sen. John McCain of Arizona will throw his support behind Republican presidential hopeful Mitt Romney on Wednesday, a senior Republican source close to the senator said.
The 2008 Republican presidential nominee will travel to New Hampshire to make the endorsement.
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McCain won the New Hampshire primary during his presidential bid, beating Romney, who quickly endorsed McCain after he dropped out of the race in early February following key losses on Super Tuesday.
News of the endorsement was first reported by BuzzFeed Politics.