The husband of former Alaska governor and one-time vice presidential candidate Sarah Palin has filed for divorce.

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 filing, and a judge's written orders, Sarah Palin "cannot threaten, harass or harm the opposing party or children. For example, you cannot physically hurt, stalk, excessively call, email or text the opposing party."

The filing uses initials, but the couple's wedding date and the birth date of their juvenile son, Trig Palin, match, the paper reported. There was no immediate response from either Palin.

Todd Palin seeks joint custody of Trig, who has special needs. The rest of the couple's children, including daughter, Bristol, are grown and live on their own.

Sarah Palin, also 55, was elected governor in 2006. She skyrocketed to fame — and some say, infamy — when GOP presidential nominee John McCain picked her as his running mate in the 2008 election.

Todd, a commercial fisherman, oil worker and racer, has been married to her for 31 years.

She resigned as governor in 2009, and has written books and toured as a public speaker since then.

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