No. Obama won by 313 to 225 electoral votes. Florida had 29, Ohio 18, and Virginia 13. If you switch all three states to Romney then Romney would have won 285 to 260.

Your 313 figure is incorrect. Obama won with 332 votes to Romney's 206. See the link I posted.

Sorry, I was looking at the wrong page while I wrote that. But the greater point stands -- swinging Florida, Ohio, and Virginia would not have swung the election.

313 was Nate Silver's average outcome prediction. The mode of 332 is what actually happened.

No, the parent was correct. 313 to 225 was Nate Silver's prediction (note "Forecast"). The actual electoral vote was (assuming Obama won Florida) 332 to 206.