Interesting poll numbers from ABC News:
Barack Obama's most committed partisans, beyond African American voters, are young voters, voters under 30. In March, 66 percent of them said they would vote, no matter what -- that is down to 46 percent right now. Their enthusiasm has been dampened a bit over the course of this campaign.
The under 30 crowd seems to be thinking hard about Obama especially after increasingly critical analysis of his past.