In the latest example of the right's war against Hollywood activists, the actor's appearance in a pro-Obama documentary is challenged.

Liberal, politically active celebrities beware: Online conservative activists are pouncing on every act of perceived hypocrisy. The latest target is Tom Hanks.

The actor narrates a recently released 17-minute documentary promoting the re-election of President Barack Obama, which has led to political ridicule from the right-leaning Daily Caller. The publication unearthed video from 2004 of an event that some critics online are saying was racially insensitive.