The Youth Vote may not be as Obama lopsided as last time.
A Romney first: over 40% of youth vote back him | WashingtonExaminer.com
There is also indications that the youth vote is not as mobilized as last time, so the combination of more romney voters in that pool, combined with less overall voters is a bad one for Obama.
The Youth vote had nowhere to go but downward for Obama. According to your source he's still ahead comfortably. And the dismobilization is effecting both men the same.
When you add Obama's advantage in the Youth vote to his lock on the intellectual, minority, and women's vote; the Governor is circling the drain.
Not so on the youth vote. 1, its tilting back towards romney, 2, its decreasing overall, therefore it hurts obama more than romeny, depending on which states it is happening in.
On the black vote, yes he still has the numbers, but thier enthusiasm is way down. Other minorities with the exception of hispanic arent big enough to make a difference, and with Hispanic you always have to watch out about the social issues thing. Go to hard on abortion and you will lose votes, or lose turnout.
Finally the intellectual vote is so small as to render it meaningless, unless you mean the affluent limosuine lberal vote, and those states are already going to Obama, so thier turnout is meaningless.