Mitt Romney, the former Republican governor of Massachusetts, was physically assaulted Monday by a fellow passenger on a flight from Vancouver, Canada, to Los Angeles. Romney, a 2008 presidential candidate and a potential 2012 contender, asked a passenger who was seated and reclining in front of his wife, Ann, to move his seat upright during take off. "The passenger became physically violent. Governor Romney did not retaliate, but instead let the airline crew respond to the incident," said Romney spokesman Eric Fehrnstrom.