Georgia’s Chris Carr is among 21 state attorneys general who have filed a letter describing House Democrats’ attempt to impeach President Donald Trump as unconstitutional.

The letter filed to the U.S. Senate encourages its members to dismiss the charges and clear Trump of any wrongdoing.

“This impeachment proceeding threatens all future elections and establishes a dangerous historical precedent,” the attorneys general wrote.

The 14-page letter lays out a legal argument against impeachment and is essentially a “friend of the court” brief filed when a person or entity is not part of a case but asks to weigh in with additional information or insight.

In addition to Carr, Republican attorneys general from the following states signed the letter: South Carolina, Louisiana, Utah, Alabama, Arkansas, Arizona, Florida, Indiana, Kansas, Kentucky, Mississippi, Missouri, Montana, Nebraska, Ohio, Oklahoma, South Dakota, Tennessee, Texas and West Virginia.

It accuses House Democrats of impeaching Trump for partisan reasons and says the rationale behind the two charges the president faces is weak and contrary to the vision of the Founding Fathers.