LANSING, Michigan (Reuters) - In today's partisan environment, many U.S. politicians tend to hew close to their base and not worry about angering their opponents, but Michigan Governor Rick Snyder possesses a rare talent for raising hackles on both sides. In early December, the Republican governor angered the state's powerful labor unions by signing so-called "right-to-work" legislation allowing workers to opt out of union membership. Then earlier this month, Snyder annoyed Michigan's small-government conservatives with a plan to expand Medicaid and raise the gas tax for road repairs. ...