Earlier this week, President Donald Trump issued an executive order seeking to change how states conduct their elections.

Maine Attorney General Aaron Frey says the president has no authority to do so.

Frey announced Friday that he’s joining a coalition of 22 other states in suing Trump over the order.

“President Trump only further demonstrates his contempt for free and fair elections as he seeks to engineer the outcome of the next election by interfering with how citizens vote by mail,” Frey wrote in a statement, calling it an “unconstitutional intrusion into the ballot box.”

Trump’s executive order seeks in part to create a national list of eligible voters, and directed the U.S. Postal Service to only send mail ballots to those voters.

The U.S. Constitution gives states the authority to administer their elections, not the federal government, Frey noted in his release.

Secretary of State Shenna Bellows, the state’s top elections official, said in a written statement Friday afternoon that she supports Maine joining the lawsuit.

“Each time Donald Trump gets blocked in an attempt to control the outcome of the November Midterms, he just tries another tact. … There is no question this executive order is unconstitutional — laughably so. There is also no question that it will be soundly defeated in court,” Bellows wrote.