This idea that there are people that fall somewhere between Romney and Obama who haven’t decided who they’re voting for I think is a myth. There are about as many of them as there are readers of B&E these days.
It’s far more likely that this high number of “undecideds” in various polls are actually people to the right of Mitt Romney and to the left of Obama (or those Libertarian drifters-in-space who float nebulously around the political spectrum), who can’t decide if they’re going to hold their noses and go with the person they align with most, or just not suffer the stink at all and stay home on election day.
I have no proof about this, of course. But honestly, how many Michael Bloombergs can be out there?