But there also may have been something of a “Buffett effect” that countered the supposed “Bradley effect” — white voters telling pollsters they’d vote for Obama but then voting for the white guy. The Buffett effect was just the opposite. It was white conservatives telling the guys in the men’s grill at the country club that they were voting for John McCain, but then quietly going into the booth and voting for Obama, even though they knew it would mean higher taxes
Op-Ed Columnist - Finishing Our Work - NYTimes.com
One person I know did exactly did this. You know who you are.