Sen. John McCain (R-Ariz.) will reportedly throw his support behind former Massachusetts Governor Mitt Romney in the race for the Republican presidential nomination.

A former aide to McCain told BuzzFeed that the Arizona Republican will endorse Romney on Wednesday in the key early primary state of New Hampshire.

McCain, who ran as the Republican party's presidential nominee in 2008, signaled to The Hilllast month that he would line up behind one of the GOP candidates pursuing the White House, likely sometime after the Iowa caucuses.

Romney proved a valuable champion for McCain during his presidential campaign in 2008 and later, in 2010, during his primary fight against fellow Republican J.D. Hayworth.

The Hill reported last month that McCain had considered Romney an integral part of his White House bid:

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