Ambers' take:
Right now, the type of voter who's paying attention is primed to support John McCain. After the conventions, when younger voters typically tune in -- and by younger here, I mean, under 55 or so -- then Obama's margins will widen because these folks are his folks.
This article available online at:
http://www.theatlantic.com/daily-dish/archive/2008/08/why-so-close/213270/
