When Obama steps onto a grass quad at the University of Wisconsin on Tuesday, he will deliver a newly tailored, more personalized campaign appeal aimed at ginning up enthusiasm, according to White House and senior Democratic officials. Plouffe said Obama will remind students of the work they put into his 2008 campaign and warn them that if they don’t reengage now, “all that could be jeopardized.”

The students on this leafy, generally liberal campus once constituted one of the strongest battalions in Obama’s grass-roots army. Two years later, the political dynamic has changed. Across campus, stickers, signs or chalkings for any politician are scarce. The laundromat where Obama’s young volunteers once staged late-night phone banks and planned bus trips to neighboring Iowa has gone out of business. And some students who say they voted for Obama in 2008 now say they don’t even know who’s on the ballot this fall…

“A lot of young people are not disenchanted with Obama,” said Maggie Bahrmasel, a senior who volunteered for Obama in the Iowa caucuses and now directs campaign outreach for the College Democrats. “I think they just pay attention less.”