Of the eight States that picked up seats, five were won by Romney, resulting in an additional eight electoral votes that he would not have had in 2008. Of twelve states that lost seats, two were won by Romney, meaning two fewer electoral votes, a net gain of six votes. On the other side, Obama picked up an additional four electoral votes from States that gained seats but lost ten electoral votes from the States that lost seats, a net loss of six votes. Imagining that there had been no changes to seats in 2010, Obama would have won the 2012 Election by a slightly wider margin, 338 Electoral Votes for him, 200 for Romney.
Obviously, the ultimate impact here was inconsequential, due to Obama's margin of victory. Yet, if we imagine that Romney won Virginia, Florida, Nevada, and Ohio (a fantasy, as it turned out), he would have won the election, 272 Electoral Votes (Romney) to 266 Electoral Votes (Obama). However, if the Apportionment of 2010 had not occurred, the totals would have been different. Romney would have had eight fewer Electoral Votes, Obama would have had eight more: 264 Electoral votes for Romney, 274 Electoral Votes for Obama (in 2008 Apportionment numbers). Thus, Obama would have won, even if Romney had been more successful in the "swing" States.
