The husband of former Alaska governor and one-time vice presidential candidate Sarah Palin has apparently filed for divorce, according to a report. Todd Palin, 55, cited an "incompatibility of temperament between the parties such that they find it impossible to live together as husband and wife," in a document filed Friday in Anchorage, according to the Anchorage Daily News. There was no immediate response from either Palin. They have been married for 31 years.