I agree. He was really giving Romney some super odd looks. Somewhere between mad and mocking, and yet mostly just goofy looking smirks.
He’d also look back and forth, and blinked a lot. Nixon used to blink a lot.
How much of it was real and how much was second-rate method acting on the fly is probably unknowable at this point, but he managed to look pretty small regardless.
Mr. niteowl77