Short version:
The 3 KEY states are now Virginia, Iowa, and Colorado.
Long version:
We all know if Romney takes Ohio, he is the president. But there is ONE clear path for him without Ohio, so let's look at that.
1. Obama is pulling out of Florida and North Carolina. Those are now RED. That leaves you with 7 tossups:
New Hampshire
Virginia
Ohio
Wisconsin
Iowa
Colorado
Nevada
Romney is at 235 Electoral votes.
The 3 key states are Virginia, Iowa, and Colorado.
2. In Virginia, the polls average has Romney in the lead. If he takes it, Romney moves to 248 EVs.
3. In Iowa, Obama is +2, but a couple polls have Romney in the lead. Romney wins Iowa and he has 254 EVs
4. In Colorado, there are some polls with Romney tied or ahead. if he grabs that state, he moves to 263 EVs
If Virginia, Iowa, and Colorado go Romney, Romney just needs Nevada's 9 Electoral Votes to reach 269 and become president, thanks to the tiebreaker being the House vote. He can lose Ohio and be president. The Nevada vote is VERY close. A V-I-C win ensures election night will go on a long time.
This also dismisses Wisconsin, where the polls are tightening, the last two showing a +3 Obama lead and a tie. And again, it assumes Ohio votes Obama, where the polls are also within the margin of error.
Also note that of the 7 states up for grabs, if Romney carries ONLY Virginia, Iowa, Colorado and Nevada, we have a 269-269 tie, and President Romney and Vice-President Biden. And that is actually a fair possibility.
Keep an eye on the one district in Maine as well. Maine apportions 2 of its Electoral Votes. If that one district goes Romney, he can pick up 270 and Biden is out as well.