From the most recent TiVo newsletter I received:
"[FCC rules require] broadcasters to give equal air time to all candidates, free of charge, if they air entertainment content featuring a political rival. (Meaning if Arnie's films air on broadcast TV, all of the 134 other opponents in California's recall election race could demand equal time--FREE!)"
Cable networks are technically exempt from this rule, but some of them are adhering to it anyway. For example, the Sci Fi channel recently ditched their scheduled night of Schwarzenegger's films ... and replaced it with California-themed disaster movies instead. I love this country.