George ConwayGeorge Thomas ConwayGrocery store behind viral reusable bag at impeachment hearing offers 'free briefcase' promotion The Hill's 12:30 Report — Presented by UANI — GOP, Democrats square off at final impeachment hearing GOP counsel raises eyebrows with shopping bag at impeachment hearing MORE called out first lady Melania TrumpMelania TrumpFirst lady lends a hand to 'Toys for Tots' charity drive The Hill's 12:30 Report — Presented by UANI — GOP, Democrats square off at final impeachment hearing The Hill's Morning Report - Sponsored by AdvaMed - A crucial week on impeachment MORE on Twitter over her criticism of an impeachment witness mentioning her and President TrumpDonald John TrumpLawmakers release defense bill with parental leave-for-Space-Force deal House Democrats expected to unveil articles of impeachment Tuesday Houston police chief excoriates McConnell, Cornyn and Cruz on gun violence 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.”

But George Conway, husband of White House counselor Kellyanne ConwayKellyanne Elizabeth ConwayGrocery store behind viral reusable bag at impeachment hearing offers 'free briefcase' promotion Watchdog report finds FBI not motivated by political bias in Trump probe GOP counsel raises eyebrows with shopping bag at impeachment hearing 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.

Karlan later apologized for her comments after Rep. Matt GaetzMatthew (Matt) GaetzTempers flare at tense Judiciary hearing on impeachment Gaetz questions Democratic counsel about political donations GOP lawmaker criticizes Democratic counsel over facial expression: 'Be very careful' MORE (R-Fla.), a President Trump ally, said the remarks made her “look mean” during the hearing. White House press secretary Stephanie GrishamStephanie GrishamSecond appeals court backs lifting injunction on Trump 'public charge' rule Live coverage: Democrats, Republicans seek to win PR battle in final House impeachment hearing White House spokesperson: Pelosi, Democrats 'hate Trump's success' 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.