George Conway George Thomas ConwayGeorge and Kellyanne Conway honor Ginsburg Lincoln Project releases new ad blasting Trump as 'a horrible role model' George Conway hits Trump on 9/11 anniversary: 'The greatest threat to the safety and security of Americans' MORE called out first lady Melania Trump Melania TrumpWatchdog confirms State Dept. canceled award for journalist who criticized Trump Ginsburg becomes the first woman to lie in state in the Capitol Rabbi memorializes Ginsburg: Her dissents were 'blueprints for the future' MORE on Twitter over her criticism of an impeachment witness mentioning her and President Trump Donald John TrumpBiden says voters should choose who nominates Supreme Court justice Trump, Biden will not shake hands at first debate due to COVID-19 Pelosi: Trump Supreme Court pick 'threatens' Affordable Care Act MORE’s son, Barron, during the Wednesday hearing.

Stanford Law School professor Pamela Karlan made a joke about Barron’s name during her remarks.

"Contrary to what President Trump has said, Article 2 does not give him the power to do anything he wants, and I'll just give you one example that shows you the difference between him and a king, which is the Constitution says there can be no titles of nobility, so while the president can name his son Barron, he can't make him a baron," she told lawmakers on the House Judiciary Committee.

Melania Trump later criticized Karlan on Twitter, writing, “A minor child deserves privacy and should be kept out of politics. Pamela Karlan, you should be ashamed of your very angry and obviously biased public pandering, and using a child to do it.”

A minor child deserves privacy and should be kept out of politics. Pamela Karlan, you should be ashamed of your very angry and obviously biased public pandering, and using a child to do it. — Melania Trump (@FLOTUS) December 4, 2019

But George Conway, husband of White House counselor Kellyanne Conway Kellyanne Elizabeth ConwaySpecial counsel investigating DeVos for potential Hatch Act violation: report George and Kellyanne Conway honor Ginsburg Trump carries on with rally, unaware of Ginsburg's death MORE, accused Melania Trump of amplifying Karlan’s comments, which he called a “nothingburger reference."

“So therefore you’re amplifying what was a nothingburger reference a hundred-thousand-fold. Got it,” Conway tweeted.

So therefore you’re amplifying what was a nothingburger reference a hundred-thousand-fold. Got it. https://t.co/MMSBhMWQE4 — George Conway (@gtconway3d) December 4, 2019

Karlan later apologized for her comments after Rep. Matt Gaetz Matthew (Matt) GaetzSunday shows preview: Lawmakers prepare for SCOTUS confirmation hearings before election Trump faces tricky choice on Supreme Court pick Florida attorney general scrutinizing Bloomberg paying fines for felons to vote MORE (R-Fla.), a President Trump ally, said the remarks made her “look mean” during the hearing. White House press secretary Stephanie Grisham Stephanie GrishamIvana Trump on Melania as first lady: 'She's very quiet, and she really doesn't go to too many places' The Hill's 12:30 Report: Trump uses White House as campaign backdrop Coronavirus tests not required for all Melania Trump speech attendees: report MORE also tweeted that the comments were “classless.”

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"I want to apologize for what I said earlier about the president's son. It was wrong of me to do that," Karlan said. "I wish the president would apologize, obviously, for the things that he's done that's wrong, but I do regret having said that."

Karlan was testifying before the Judiciary Committee on Wednesday alongside three other legal scholars in the ongoing impeachment inquiry against President Trump.