Two of the GOP hopefuls have ties to the Wolverine State, which holds its primary Jan. 15, The Detroit News reported Wednesday.
Former Massachusetts Gov. Mitt Romney is a Michigan native whose father was a three-term Michigan governor. Arizona Sen. John McCain, who won the New Hampshire primary Tuesday, won an upset in Michigan in 2000 over the eventual GOP nominee, then-Texas Gov. George Bush.
Despite McCain's momentum going into the Michigan primary, state GOP Chairman Saul Anuzis called the state race "wide-open," saying McCain, Romney and former Arkansas Gov. Mike Huckabee -- who won last week's Iowa Republican caucuses -- all had a chance to do well.
Romney has spent more than $1 million on TV advertising in Michigan and has an established campaign team in place there, the newspaper reported.