Sarah Palin’s husband, commonly referred to as “Alaska’s first dude” when she was governor of the US state, appears to be seeking a divorce from his wife of 31 years.

Paperwork believed to be from Todd Palin cited “incompatibility of temperament” in seeking to end his marriage to the 2008 Republican vice presidential nominee.

The filing on Friday in Anchorage Superior Court only identified the couple by initials. The initials, birthdates and wedding date match the Palins, as do the initials given for their only young child living at home.

The documents list the minor as T.P.V.P., born April 18, 2008, the same date Sarah Palin gave birth to Trig Paxon Van Palin, the youngest of the couple’s five children.

The Palins married in 1988. After Sarah Palin became governor in 2006, Todd Palin continued to fish commercially and work an oil field job on the North Slope. Their lives were ever changed after Republican presidential candidate John McCain picked Sarah Palin as his running mate.

During her speech to the Republican National Convention, Palin talked about her long relationship with her husband.

“We met in high school, and two decades and five children later, he’s still my guy,” she said at the time.

In the divorce filing believed to be from Todd Palin, he seeks joint custody of the child. He also wants an “equitable division” of marital debts and assets.

“There is an incompatibility of temperament between the parties such that they find it impossible to continue to live together as man and wife,” the complaint said.

Kimberlee Colbo, an Anchorage lawyer for the plaintiff, didn’t immediately respond to requests for comment on Monday. She filed paperwork to keep the divorce confidential to protect the privacy of the child.

-AAP