From a national perspective, Wisconsin’s most important message may be that Democrats continue to face enormous difficulty among blue-collar whites, but don’t yet face fatal defection from the cornerstones of their modern coalition, minorities, young people and white-collar whites, especially women. Walker’s survival adds more evidence that Obama and other Democrats face huge headwinds this November in states where those blue-collar whites dominate the electorate, as they do in Wisconsin. And that will increase the pressure on the president (and his party, in Congressional races) to maximize their gains this fall in states, like Colorado and Virginia, where an upscale-downscale coalition of white-collar whites and minorities can fashion a majority.

In Walker’s 2010 victory, the Republican ran better among both non-college and college-educated whites than John McCain did against Obama in 2010. But the biggest shift away from the Democrats came among Wisconsin’s blue collar whites. In 2008, Obama carried 52 percent of Wisconsin whites without a college degree, one of his best showings anywhere. But in 2010, Tom Barrett, the Democratic gubernatorial nominee who lost the rematch to Walker last night, drew just 40 percent of them. Walker won a commanding 58 percent of non-college whites, up substantially from McCain’s 47 percent two years earlier.

Walker’s surge was emblematic of the movement toward the GOP among working-class whites virtually everywhere in 2010: the GOP captured 63 percent of them in House races nationwide, according to the exit polls. On Tuesday, Walker suggested that red wave among blue-collar voters has not receded-and may not yet even have crested. According to exit poll results posted on CNN, Walker expanded his share of Wisconsin’s non-college white vote to 61 percent and pushed down Barrett to 39 percent. Barrett drew a respectable 44 percent of non-college white women (compared to 55 percent for Walker), but faced a full-on stampede from working class white men. A head turning 67 percent of white men without a college degree backed Walker; just 33 percent of them supported Barrett.