Lead impeachment manager for Donald Trump’s second House trial, January 6 committee member, cancer survivor, and now—copy editor? Congressman Jamie Raskin added another line to his lengthy resume on Friday in a tart response to embattled New York Representative George Santos, who had penned a poorly written letter thanking the Maryland Democrat for voting against kicking him out of the House of Representatives.

Santos’s letter came two days after most Republicans and 31 Democrats voted against a resolution led by five of Santos’s fellow first-term New York Republicans who have been anxious to distance themselves from their disgraced colleague. The 179-213 tally fell far below the two-thirds majority needed to expel a House member.

“I am writing to express my gratitude to you for standing up to the principals of due process and the presumption of innocence until proven guilty,” Santos wrote. In copy edits handwritten on his copy of the letter and later reported by Politico, Raskin cheekily let Santos know that “principals” should have been “principles.”

“Dear Congressman Santos, I appreciate your note and only wish someone had proofread it first,” Raskin wrote. “Meantime, you should apologize to the people of New York for all of your lies and deceit. I know you must have thought you could get away with it all in the party of Trump, but the truth is resilient.” The Maryland representative ended the letter with a “P.S.”: “It’s not shameful to resign.”