McCain won the state's primary eight years ago on the strength of independent voters, and hopes for a reprise on Tuesday. He has regained the lead in the national polls that he enjoyed months ago — before his campaign nearly came apart over the summer.Huckabee campaigned on economic issues during the day.
"Some of the toughest competition your company faces is from its own government, whose tax policies, whose regulatory policies, the threat of litigation, makes it real tough to stay in business," he told employees at a Demmer Corp. plant near Lansing that makes armored personnel carriers for the military.
Romney went before the Detroit Economic Club for a speech meant to appeal to laid-off workers as well as voters who recall his father's tenure as governor a generation ago.
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