SHELBY TOWNSHIP, Mich. (WJBK) -- In Michigan, presidential candidate Mitt Romney is in a virtual dead heat with candidate Rick Santorum, so Romney was pressing the flesh in Macomb County on Tuesday trying to pull out a win next week. "Let me introduce the comeback kid, Mitt Romney, the next president of the United States of America," said Romney's Michigan co-chairman Bill Schuette as he introduced his candidate. It wasn't long before Romney took on labor union bosses. He claimed that unions do have an important role to play in this country, but those bosses, quite another story.