Once thought to be an easy win for native son Mitt Romney, the Michigan primary has instead turned into one of the stiffest tests for the Republican presidential front-runner — and an unexpected opportunity for the surging campaign of Rick Santorum.

After his surprising sweep of three states last week, Santorum is targeting the Feb. 28 contest, seeing in Michigan the combination of working-class and socially conservative voters on which he has based his campaign. And in Michigan, the former senator from Pennsylvania looks like he will get the one-on-one match-up with Romney that he has been craving — as long as Newt Gingrich and Ron Paul continue to largely look past the state.