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

Conservative commentator George ConwayGeorge Thomas ConwayGeorge Conway: We might have to impeach Trump again George Conway writes the Trump 'creed' in satirical op-ed George Conway: 'Verdict of history' will be on Romney's side MORE and Donald Trump Jr.Donald (Don) John TrumpTrump Jr., Meadows wear matching Trump jackets on 'Fox & Friends' Group auctioning off hunting trip with Donald Trump Jr. Trump allies to barnstorm Iowa for caucuses MORE squared off via Twitter during Marie YovanovitchMarie YovanovitchDemocrats worried about Trump's growing strength Congress looks to strengthen hand in State Department following impeachment Trump unleashed: President moves with a free hand post-impeachment MORE's public impeachment hearing Friday.

Trump Jr., son of President TrumpDonald John TrumpCensus Bureau spends millions on ad campaign to mitigate fears on excluded citizenship question Bloomberg campaign: Primary is two-way race with Sanders Democratic senator meets with Iranian foreign minister 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 ConwayBrazile 'extremely dismayed' by Bloomberg record Conway: Reported sexist Bloomberg remarks 'far worse' than what Trump said on 'Access Hollywood' tape Candidates make electability arguments, talk Bloomberg as focus turns to more diverse states 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.