Rudy Giuliani, President Donald Trump’s personal attorney, announced on Tuesday, Oct. 15, that he refuses to comply with a congressional subpoena for testimony of information regarding the impeachment inquiry led by House Democrats.

In a statement to the House Intelligence Committee, Giuliani’s lawyer, Jon Sale, wrote that Giuliani will not comply with the subpoena, citing a White House letter stating that it would not cooperate with the impeachment inquiry, which it claimed was invalid, The Hill reports.

Sale, before being dismissed by Giuliani, sent a letter to the House on behalf of Giuliani to formally respond to the subpoena.

“Please accept this response as formal notice that Mr. Giuliani will not participate because this appears to be an unconstitutional, baseless, and illegitimate ‘impeachment inquiry,’” Sale wrote, calling the subpoena “overboard, unduly burdensome, and seeks documents beyond the scope of legitimate inquiry.”

House Democrats reportedly sent Giuliani a subpoena on Sept. 30 demanding documents related to his work in Ukraine, a centerpiece of an ongoing impeachment inquiry into Trump, and gave him a deadline of Oct. 15 to comply with the impeachment probe, according to the National Review.

The letter to Giuliani warned of the possibility of “evidence of obstruction” being “used as an adverse inference against [Giuliani] and the president.”

At the time, Giuliani said he would consider complying after having received the subpoena, but condemned Democratic lawmakers who signed the document as having “prejudged” the case, according to The Hill.

“I will not participate in an illegitimate, unconstitutional, and baseless ‘impeachment inquiry,’” Giuliani tweeted on Tuesday.

“If they enforce it then we will see what happens,” Giuliani said during an ABC News interview on Tuesday.

Giuliani said during a Sept. 29 interview on ABC News that he would only consider complying with House inquiry if he was instructed to do so by the president.

“If [Trump] decides that he wants me to testify, of course I’ll testify, even though I think Adam Schiff is an illegitimate chairman. He has already prejudged the case,” Giuliani said.

The White House, in a letter to House Democratic leaders, said that the impeachment inquiry had violated precedent and denied President Trump’s due process rights in such an egregious way that neither the president himself nor the executive branch would be willing to provide testimony or documents.

“Your unprecedented actions have left the president with no choice,” the letter said. “In order to fulfill his duties to the American people, the Constitution, the executive branch, and all future occupants of the office of the presidency, President Trump and his administration cannot participate in your partisan and unconstitutional inquiry under these circumstances.”