This file photo shows Former Massachusetts governor Mitt Romney (L)...

This file photo shows Former Massachusetts governor Mitt Romney (L) shaking hands with former New York City mayor Rudy Giuliani prior to the start of a Republican presidential debate in St. Petersburg, Florida. (Nov. 28, 2007) Credit: Getty Images

Former New York City Mayor Rudolph Giuliani is giving his support to presumptive Republican presidential nominee Mitt Romney.

The Romney campaign announced the endorsement in a statement Monday.

Giuliani said that he was "convinced" Romney would be a "clear contrast" to President Barack Obama. He said Romney "excels at turning around difficult situations" and that he was "proud" to support him.

The men were opponents at one point, when both were running for the Republican presidential nod in the 2008 election.

The endorsement was announced one day before New York state's Republican presidential primary, one of five being held on Tuesday.

Teen sentenced for fatal stabbing at house party ... Weekend highway closures ... Working Moms: Priority shift Credit: Newsday

Blue wave sweeps across NY ... Teen sentenced for fatal stabbing at house party ... Teacher assistant fired after stalking allegations ... Governor's race wrap

Teen sentenced for fatal stabbing at house party ... Weekend highway closures ... Working Moms: Priority shift Credit: Newsday

Blue wave sweeps across NY ... Teen sentenced for fatal stabbing at house party ... Teacher assistant fired after stalking allegations ... Governor's race wrap

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