Sabato's Crystal Ball created an electoral map for a Gingrich-Obama race:
In several Midwestern swing states, Republicans gained many House seats in 2010 that, thanks to their control of redistricting, they sought to lock in through aggressive remapping. Under this map, all of those states — Michigan, Ohio, Pennsylvania and Wisconsin — would be tough territory for Gingrich. If his candidacy were a disaster, those new Republican gerrymanders could unravel. The close battle for the Senate could also be affected — Michigan, Missouri, Montana, Nevada, New Mexico, Ohio and Virginia all have competitive Senate races this year, and all of those states get bluer on our map under a hypothetical Gingrich candidacy.