It seemed innocuous enough at the time. The Democratic speaker of the House and one of her Republican predecessors cozy up on a love seat arranged for them at the bottom of Capitol Hill. They look into the camera, then at each other, and declare that they are really not all that different when it comes to caring about global warming.

Former U.S. Speaker of the House and Republican candidate for president Newt Gingrich speaks during the 2011 Republican Leadership Conference on June 16, 2011 in New Orleans, Louisiana.

What does Newt Gingrich think of his tender moment with Nancy Pelosi now? “Probably the dumbest single thing I’ve done in recent years.”