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From there, Mr. Romney heads for Virginia, then Ohio, and back to Florida — a trio of states that Mr. Obama carried in 2008 and George W. Bush carried in 2000 and 2004 on their way to victory.

This year, the states represent nearly a quarter of the 270 electoral votes needed to capture the White House, and a Real Clear Politics average of polls shows Mr. Romney is running neck and neck with Mr. Obama in each of them.

Mr. Madden also said the campaign will focus on Colorado, Iowa, Michigan and Wisconsin.