Julianne Moore as Sarah Palin. Ed Harris as John McCain (huh?). Woody Harrelson as his campaign manager, I think. The movie is Game Change (based, I would guess, on a book of that title), to appear on HBO in March 2012.
Video - 'Game Change' Teaser Trailer - Julianne Moore as Sarah Palin, Ed Harris as John McCain - WSJ.com
Video - 'Game Change' Teaser Trailer - Julianne Moore as Sarah Palin, Ed Harris as John McCain - WSJ.com