Super-PAC boosts Santorum spending in Michigan

The candidates in Michigan’s Republican presidential primary are expected to pour a lot of money into advertising in the state.

Polls show Mitt Romney and Rick Santorum are evenly matched in popular support.

Romney and his political action committee are expected to spend millions in Michigan.

But a super-PAC behind Santorum reportedly will spend $650,000 in the state.

Bill Ballenger is editor of Inside Michigan Politics.

He says for a super PAC to make that kind of financial commitment shows it believes Santorum has a real chance to win the Michigan's  GOP primary.

"He hasn't spent anything  even approaching that in any state, or I think total, anywhere in this campaign," Ballenger says. "It might prove, if not fatal to Mitt Romney's candidacy, he would be very badly wounded going into Super Tuesday a week from the Michigan primary," Ballenger says.

Romney was born in Michigan and says his desire to win the nomination is “personal.”

Michigan’s GOP primary is February 28th.