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Julie Jacobson, Associated Press
Supporters for Republican presidential candidate, former Massachusetts Gov. Mitt Romney, react to caucus results as they are shown on a television screen during a caucus night watch party, Saturday, Feb. 4, 2012, in Las Vegas.

LAS VEGAS — Republican presidential front-runner Mitt Romney has declared victory in Nevada's caucuses.

He thanked Nevada voters for their confidence in him and vowed to take it all the way to the White House.

Romney's decisive win comes four days after he cruised to a double-digit victory in Florida's primary, cements his status as front-runner and leaves his rivals struggling to keep pace. Nevada was the West's first nominating contest.

The former Massachusetts governor has the advantages of cash and a strong political organization as the contest heads to states that appear friendly, including Colorado and Minnesota, which Romney won in 2008, and Michigan, where Romney grew up and his father was governor.