A snowball fight rages among University of Wisconsin-Madison students on Bascom Hill in Madison, Wis., Dec. 20, 2012.

University of Wisconsin-Madison students try to help a food delivery truck driver free his vehicle from snow after it made a stop at Wasabi Japanese Restaurant in Madison, Wis., Dec. 20. They were not successful.

An Amish boy plays in snow outside a one-room schoolhouse in Kingston, Wis., Dec. 20.

Whiteout conditions along a county road near Beaver Dam, Wis., Dec. 20.

Luke McHenry, left, and his son Sebastian Wells dig out their snow-buried vehicle in Madison, Wis., Dec. 20.

Elizabeth Wrigley-Field of Madison, Wis. is escorted out of the Wisconsin State Capitol Assembly Room lobby by law enforcement personnel on Thursday, March 10, after spending the night in the room with demonstrators opposed to Gov. Scott Walker's budget repair bill. Tensions have flared after Republican senators passed an amended version of the controversial bill which largely strips collective bargaining for public employees.

Police try to secure a door during a protest at the Wisconsin Capitol on Thursday. The standoff over union rights that rocked Wisconsin and the nation for weeks headed for a swift end Thursday, as Republican lawmakers were set to strip nearly all collective bargaining rights from the state's public workers and deliver one of the strongest blows to the power of unions in years.

Police remove a protester from the vestibule in front of the Wisconsin state assembly chamber in the Capitol on March 10 in Madison. The protesters were blocking the entrances to the chamber hoping to prevent the Assembly from meeting. Thousands of demonstrators took over the Capitol last night after the Wisconsin Republican senators voted to curb collective bargaining rights for public union workers in a surprise vote with no Democrats present.