In most states, any registered voter can begin a recall campaign for any reason. Often, the reasons are political. The 2011 recall efforts provide a good example for politically-motivated recalls. In Wisconsin, Republican senators faced recalls for their support of the governor's effort to reduce the influence of public employee unions, while Democratic senators faced recall because voters disapproved when they left the state to delay a vote on the union issue. In Arizona, a senator faced recall for his sponsorship of a controversial immigration bill.