Opponents of Wisconsin Republican Gov. Scott Walker have submitted more than a million signatures seeking his recall in a statewide vote. The million-plus signatures amount to nearly double the required number of 540,000 and may mark the largest recall effort in U.S. history. Walker is being challenged for pushing through a controversial law ending collective bargaining rights for most public workers. The million signatures "represent almost half of the electorate in the last election, in 2010, and what you might reasonably presume to be the electorate that would participate in a recall election," says John Nichols of The Nation magazine. "[Walker] will be forced to face a new election, because he adopted the austerity agenda of the Republican and conservative leadership in Washington and tried to balance budgets on the backs of public employees, tried to destroy their unions, tried to cut school funding, and succeeded in cutting funding. And we’re going to have a referendum on the most fundamental of economic issues."