Indiana Attorney General Curtis Hill is adding his voice to the national effort against the impeachment of President Trump.

Hill sent a letter to all of the members of the U.S. Senate Wednesday, in which he described the two impeachment articles leveled against the president as “fundamentally flawed as a matter of constitutional law.”

He says the articles are “ruinous” and the action is a partisan effort that undermines the democratic process.

Hill traveled to Washington DC Wednesday to take part in a press conference about the impeachment with several other attorneys general.