With the election of Scott Walker in 2010, Republicans won both chambers of the legislature and the governorship, the first time all three changed partisan control in the same election. His first year in office saw the introduction of the 2011 Wisconsin Act 10, which removed collective bargaining rights for state employees. On February 14, 2011, the Wisconsin State Capitol erupted with protests when the Legislature took up a bill that would end most collective bargaining rights for state employees, except for wages, to address the $3.6 billion deficit. The protests attracted tens of thousands of people each day, and garnered international attention. The Assembly passed the bill 53–42 on March 10 after the State Senate passed it the night before, and sent it to the Governor for his signature. In response to the bill, enough signatures were gathered to force a recall election against Governor Walker. Tom Barrett, the mayor of Milwaukee and Walker's 2010 opponent, won the Democratic primary and faced Walker again. Walker won the election by 53% to 46% and became the first governor in United States history to retain his seat after a recall election.