More than 300 legal scholars are speaking out against White House counsel Pat Cipollone’s letter refusing to cooperate with the U.S. House’s impeachment inquiry, saying they “strongly disagree” with Cipollone’s claims that the inquiry is unconstitutional.

The White House counsel faced almost immediate criticism from the legal community over his Oct. 8 letter to the House, in which Cipollone argued that the impeachment inquiry “violates the Constitution, the rule of law, and every past precedent.” He said the White House wouldn’t engage with the inquiry until the entire House passed a resolution authorizing the proceedings.