Demonstrators gathered outside the Ohio Statehouse last week to protest Senate Bill 5, which would have banned collective bargaining for state workers. Unions say legislation being pushed by Republican governors nationwide is an attack on their very existence. Jay LaPrete/AP hide caption

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A protester rallied outside the Wisconsin State Capitol in Madison on Monday. Eric Thayer/Getty Images hide caption

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Former White House Chief of Staff Rahm Emanuel (center) stands among other mayoral candidates Carol Moseley Braun (from left), Miguel del Valle and Gery Chico before their debate on Thursday in Chicago. Brian Kersey/AP hide caption

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Illinois Gov. Pat Quinn speaks with reporters in his office at the capitol in Springfield. Quinn defended a massive increase in state income taxes passed by lawmakers. Seth Perlman/AP hide caption

itoggle caption Seth Perlman/AP