Via American Action News:

After 31 years of marriage, Todd Palin has filed for divorce from former Alaska governor and vice-presidential candidate Sarah Palin.

Todd Palin, 55, submitted a document in Anchorage Superior Court, asking to dissolve the marriage, referring to an "incompatibility of temperament between the parties such that they find it impossible to live together as husband and wife."

Per the Anchorage Daily News:

The divorce filing uses initials rather than full names, but identifies the couple’s marriage date and the birth date of their only child who is a minor, Trig Palin. The filing asks for joint legal custody of the child.

Anchorage attorney Kimberlee Colbo is representing Todd Palin in the divorce. In a filing, Colbo said she would ask the court to designate the divorce confidential as it moves forward.

Colbo did not immediately respond Monday to a request for comment from Todd Palin.

Sarah Palin, 55, was elected governor of Alaska in 2006.