Michigan race pivotal for Republicans
About 20% of eligible voters were expected to turn out, where freezing temperatures prevailed. The economy dominated the closely contested GOP race in recent days, with front-runners Mitt Romney and John McCain both pledging to lead a revival for a state, and an auto industry, ravaged by recession. Polls showed Mr McCain and Mr Romney in a close race, with former Arkansas governor Mike Huckabee running third.
Of the three, Mr Romney was most in need of a victory as he looks to restore some of the lustre lost with defeats in Iowa and New Hampshire.