George Conway and Trump Jr. trade personal insults during impeachment hearing

Conservative commentator 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 and Donald Trump Jr.Donald (Don) John TrumpMelania Trump's 'Be Best' hashtag trends after president goes after Greta Thunberg Trump Jr. blasts Time for choosing 'marketing gimmick' Greta Thunberg as Person of the Year White House calls Democratic witness's mentioning of president's youngest son 'classless' MORE squared off via Twitter during Marie YovanovitchMarie YovanovitchSenate confirms Trump's Russia ambassador The State Department: Nonpartisan service on behalf of America Nunes: 'Sickening' that Schiff obtained his phone records MORE's public impeachment hearing Friday.

Trump Jr., son of President TrumpDonald John TrumpRepublicans aim to avoid war with White House over impeachment strategy New York Times editorial board calls for Trump's impeachment Trump rips Michigan Rep. Dingell after Fox News appearance: 'Really pathetic!' MORE, was unimpressed with the witnesses, tweeting: "America hired @realDonaldTrump to fire people like the first three witnesses we’ve seen. Career government bureaucrats and nothing more."

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Conway, husband of White House advisor Kellyanne ConwayKellyanne Elizabeth ConwayMLB removing marijuana from list of banned substances Grocery store behind viral reusable bag at impeachment hearing offers 'free briefcase' promotion Watchdog report finds FBI not motivated by political bias in Trump probe MORE and vocal critic of Trump, replied to Trump Jr., tweeting: "Each of Taylor, Kent, and Yovanovitch has more intelligence, talent, integrity, decency, honor, and patriotism in each of their fingers than you and your father will ever have."

Trump Jr. shot back: "A guy who routinely & publicly embarrasses his wife by attacking her boss for the purpose of getting retweets and building his own brand is giving lectures on honor, integrity & decency. I'm sure your family really appreciates it, George. You're a disgrace."

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Diplomats William Taylor and George Kent testified Wednesday and Yovanovitch, the former U.S. ambassador to Ukraine, testified Friday. 

The public hearings are the next phase in House Democrats' impeachment inquiry.

More hearings are scheduled for next week.