Right-to-work protest in Mich.

A protester walks past Michigan State Police at the State Capitol in Lansing, Mich., Dec. 11, 2012. The crowd is protesting right-to-work legislation passed last week. The Republican-controlled Michigan legislature has given final approval to contentious laws limiting the power of unions in this labor stronghold, sending it to the governor for his expected signature. In a test of organized labor's strength in the heart of the industrial Midwest, the House passed two bills that were previously approved by the Senate. One dealt with public-sector workers and another focused on the private sector. Michigan would become the 24th right-to-work state, banning requirements that nonunion employees pay unions for services.

Michigan State Police cruisers line the pedestrian walkway west of the state Capitol in Lansing, Mich., Dec. 10, 2012.

Thousands of protesters gather for a rally on the State Capitol grounds in Lansing, Mich., Dec. 11, 2012.

Protesters gather for a rally at the State Capitol in Lansing, Mich., Dec. 11, 2012.

Michigan State Police stand guard at an entrance to the State Capitol in Lansing, Mich., Dec. 11, 2012.

Protesters gather for a rally at the State Capitol in Lansing, Mich., Dec. 11, 2012.

Union members Brian Brissette, of Auburn, Mich., from left, Tom Gazley, of Romeo, Mich., and Eric Kozlow, of Warren, Mich., watch the Michigan House of Representatives vote on a television in the at the State Capitol in Lansing, Mich., Dec. 11, 2012.

Michigan House Democratic Leader Elect Tim Greimel, right, and current House Democratic Leader Rick Hammel, left, meet with the media, in Lansing, Mich., Dec. 10, 2012.

Michigan State Police surround a man who was allegedly knocked off his segway scooter by a sheriff deputy on horseback during a rally on the State Capitol grounds in Lansing, Mich., Dec. 11, 2012.

Protesters gather for a rally outside the State Capitol in Lansing, Mich., Dec. 11, 2012.

Protesters gather for a rally in the rotunda at the State Capitol in Lansing, Mich., Dec. 11, 2012.

Protesters gather for a rally on the State Capitol steps in Lansing, Mich., Dec. 11, 2012.

Michigan State Police officers stand on the Senate side of the state Capitol in Lansing, Mich., Dec. 10, 2012.

A protester holds an American flag at a rally on the State Capitol grounds in Lansing, Mich., Dec. 10, 2012.

Protesters gather for a rally in the rotunda at the State Capitol in Lansing, Mich., Dec. 11, 2012.

Thousands of protesters gather for a rally on the State Capitol grounds in Lansing, Mich., Dec. 11, 2012.

Michigan State Police cruisers line the pedestrian walkway west of the state Capitol in Lansing, Mich., Dec. 10, 2012.

Sheet metal workers from Toledo escort an inflatable rat during a march to the State Capitol grounds in Lansing, Mich., Dec. 11, 2012.

Thousands of supporter march to the State Capitol grounds in Lansing, Mich., Dec. 11, 2012.

Members of the Michigan House Democrats and supporters stand in the office of House Democratic Leader Rick Hammel, center, in Lansing, Mich., Dec. 10, 2012, to denounce the state's right-to-work legislation which was passed last week in Lansing.

Thousands of supporters rally at the State Capitol grounds in Lansing, Mich., Dec. 11, 2012.