The U.S. House Intelligence Committee’s impeachment inquiry report is taking direct aim at White House counsel Pat Cipollone’s legal claims behind the president’s refusal to participate in the impeachment proceedings, warning they could do lasting damage to Congress’ ability to investigate potential abuses of power.

In the report, released Tuesday, congressional investigators said the letter “advanced remarkably politicized arguments and legal theories unsupported by the Constitution, judicial precedent, and more than 200 years of history.”