@obi,
"But he can't win without Ohio.
Even Romney has said so."
Um, no he hasn't. He's been pretty clear about thinking he COULD win without it. But obviously it's the main way.
@2wl,
"RealClear has Obama up in Ohio by 5"
Um, no they don't. They have him up by 1.9. Bit of a difference there, no?
Anyway, since everybody's chiming in with analysis, I might as well add to the general din of ignorance....
Indiana is of course going to vote for Romney, as will Omaha. North Carolina will too, and it seems increasingly likely Virginia will too. I think it's very likely Romney wins Florida too (even Silver has that at 67.5%). And of course, Obama wins Pennsylvania and Michigan, notwithstanding the GOP's fond hopes and dreams. So that puts us at 248-237 Romney.
So this pretty much comes down to Ohio. I have no idea who's going to win Ohio, because Obama has a narrow lead, and Romney has the momentum with two weeks left. I think it will be exceptionally close and if I said I could call it, I'd just be making stuff up. I also think anybody else who thinks they can call it is just making stuff up. So all I can do is go through why it's so crucial.
Say Romney wins Ohio. Then he's at 266 and needs one of (Nevada, Colorado, New Hampshire, Wisconsin, Iowa). The odds of one of those going for him are pretty high, especially in a world where he just won Ohio. Probably New Hampshire and Colorado.
Oh, this would probably be a good time to mention that I think Romney _probably_ wins Colorado. It'll be close, and no question the Hispanic issue obi highlighted makes it even harder to call. But Romney's had a lot of momentum there lately, he's pretty much tied it up, and his momentum continues to increase his lead very slowly. So while CO is harder to call than any of those I've put in his camp so far, I'll assume it goes Romney in future analysis. This puts us at 257-237 Romney, sans Ohio (and Romney winning with Ohio).
What if Obama wins Ohio? Then we're at 255-248 Obama (or 257-255 Romney, with Colorado). So that's not so bad, right? Romney's a little ahead still. Problem is, his options from there are pretty scant. He's still decently likely to win New Hampshire, making it 261-255. But I don't think his odds of taking Wisconsin are very good at all, especially in a world where he lost Ohio. And so it's 265-261 Obama. Then Obama just needs one of (Iowa, Nevada). I think Romney's chances of winning both of those are pretty slim, so Obama takes it down.
So there is pretty much the state of the election, and why I think anybody who purports to know what is going to happen is wrong. (Not necessarily wrong about what's going to happen, but wrong that their reasons justify their confidence).