Voters in Wisconsin will decide Tuesday whether or not to recall Republican Gov. Scott Walker. It's been one of the most expensive statewide races in American history, and the stakes in that election could have national implications, for unions, for deficit hawks, for businesses, even for President Obama's re-election.
The vote over whether to recall Walker is so important, it's drawn millions in outside money and some of the biggest political stars in the country. Now millions of dollars are flowing in, too.
The mother's milk of many political campaigns is the survey — a snapshot of how likely voters feel about particular subjects. But a recent study suggests that only 9 percent of people asked to take part in surveys actually do, calling into question any survey's findings. Slate reporter Will Oremus offers his insight.