Exclusive: How Democrats Won The Data War In 2008

Part one in a three-part series: the 2008 Data Wars, Re-examined. Later today: Catalist's after action report, posted in full. Tomorrow: Inside the Service Employees International Union's sophisticated targeting.

Get-out-the-vote operations mounted by the Obama campaign, the Democratic Party and progressive organizations mobilized more than one million dedicated volunteers on Election Day. But it was buttressed by a year-long, psychographic voter targeting and contact operation, the likes of which Democrats had never before participated in. In 2008, the principal repository of Democratic data was Catalist, a for-profit company that acted as the conductor for a data-driven symphony of more than 90 liberal groups, like the Service Employees Union -- and the DNC -- and the Obama campaign. The Catalist data was crunched by the Analyst Institute, a DC-based organization that was set up to perform rigorous experiments like these on progressive voter contact methods.. With the caveat that correlation does not equal causation, the report provides convincing, if not absolute, evidence that the progressive/Democratic data-mining and targeting operation measurably helped elect Barack Obama.

According to the analysis, those registered voters contacted by Catalist member groups turned out at a rate of 74.6%; the voters who weren't turned out in proportions roughly equivalent to the national average -- about 60.4%. In four states, the number of new votes cast by liberals exceeded Obama's victory margin: in Ohio, Florida, Indiana in North Carolina. If you assume that only 60% of these voters chose Obama, the margin was still greater than Obama's in North Carolina and Indiana, both essential to his victory

The Atlantic has obtained Catalist's official after-action report, marked "proprietary and confidential."

Assessing this part of the election has been difficult until now, because the people involved, including the Democratic National Committee, the Obama campaign and interest groups, treat the data as a state secret. They don't want to let the other side know how good they've got it. The Republican microtargeting effort helped re-elect George W. Bush in 2004 and probably saved Republicans a dozen or more House seats in 2006. Democrats were slow to realize the benefits of the technology and, until recent election cycles, lacked the organizational acuity to figure out how to catch up.

Catalist's member groups contacted a universe of 49 million adults more than 127 million times; about half of them managed to vote, representing more than 20% of all the votes cast. With a major caveat attached -- it's hard to know why individual voters are motivated to cast ballots on Election Day -- the report concludes that progressive data-driven targeting was "essential to progressive victories." In the 16 states targeted by liberal groups, more than one in three voters was contacted at least once before Election Day.

The targeting wasn't limited to Election Day. Catalist member groups generated more than 7 million new voter registrations, according to the data -- more than half of whom turned out to vote. Catalist members claim to have accumulated more than 60 million new data points on 35 million Americans as the result of its canvassing activity.

So did it work?

"The data tells us that the volume of contact was extraordinarily large; it was orders of magnitude larger than in 2004," said Laura Quinn, Catalist's chief executive officer. But it all might have been noise had the Obama campaign not embraced a methodology that used the data effectively, she said. "They really religiously built relationships and kept up person to person contact. This was an extraordinary candidate, and it was an extraordinary election, and that opened the door to places that progressives hadn't been before. It really looms large in the data."

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Marc Ambinder is an Atlantic contributing editor. He is also a senior contributor at Defense One, a contributing editor at GQ, and a regular contributor at The Week.

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