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A state representative has filed articles of impeachment against Governor Jay Nixon for his executive order telling the Revenue Department to accept joint tax returns filed by same-sex couples legally married in other states.

The articles have been filed by Parkville state representative Nick Marshall (R). He says Nixon’s action goes against Missouri’s Constitution, which voters in 2004 amended to say marriage in the state is defined as being between a man and a woman.

Marshall’s filing has been signed by seven other representatives, all Republicans.

If the filing is allowed to move forward, Nixon would be tried by a commission of seven jurists elected by the Senate.

Another representative,  Mike Moon of Ash Grove (R), has said he will seek to impeach Nixon for not acting quickly enough to set special election dates for vacant seats in the House and one in the Senate, but he has not made a filing yet.

Watch for updates on this story.