Union members and supporters march to the Michigan State Capitol building to protest against right-to-work legislation in Lansing, Michigan in this December 11, 2012, file photo. When Michigan became ... more 
Union members and supporters march to the Michigan State Capitol building to protest against right-to-work legislation in Lansing, Michigan in this December 11, 2012, file photo. When Michigan became the 24th right-to-work state in December 2012, conservatives hailed it as a sign the Rust Belt state was "open for business," union workers decried the law as "union busting" and labor leaders vowed to use it to quash Republican Governor Rick Snyder's reelection bid in 2014. A year later, the impact of the law remains up for debate. REUTERS/Rebecca Cook/Files (UNITED STATES - Tags: POLITICS BUSINESS CIVIL UNREST EMPLOYMENT) less 
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Reuters | Photo By REBECCA COOK / REUTERS
Wed, Dec 11, 2013 5:48 PM EST