Donald Trump Jr. Willy Kurniawan/Reuters

Donald Trump Jr., the president’s eldest son, and George Conway, the husband of the president’s senior adviser Kellyanne Conway, attacked each other on Twitter amid the impeachment hearings on Friday.

The spat began when Trump Jr. tweeted that three veteran diplomats who testified in the public impeachment hearings this week deserved to be fired by the president.

Conway replied, „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. hit back, accusing Conway of humiliating his wife by regularly attacking the president for the purpose of „building his own brand.“

Visit Business Insider’s homepage for more stories.

Donald Trump Jr., the president’s eldest son and top surrogate, and George Conway, the husband of the president’s senior adviser Kellyanne Conway, personally attacked each other on Twitter amid the impeachment hearings on Friday.

The spat began when Trump Jr., an aggressive and outspoken defender of his father, tweeted that the three veteran diplomats who testified in the public impeachment hearings this week deserved to be fired by the president. The witnesses are all widely believed to be credible and nonpartisan, and have all served under both Republican and Democratic administrations.

„America hired @realDonaldTrump to fire people like the first three witnesses we’ve seen,“ Trump Jr. wrote. „Career government bureaucrats and nothing more.“

George Conway, who’s an outspoken critic of the president’s despite having supported him in 2016 and early in his presidency, attacked Trump Jr. over his tweet. He defended Marie Yovanovitch, the former US ambassador to Ukraine.

„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,“ Conway wrote.

Tweet Embed:

//twitter.com/mims/statuses/1195402579766915072?ref_src=twsrc%5Etfw

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. https://t.co/xthvCDPX8C

Notably, Kellyanne and George Conway have never gone after each other in public, despite their opposing views on the Trump administration.

Trump Jr. hit back, accusing Conway of humiliating his wife by regularly attacking the president for the purpose of „building his own brand.“

„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,“ Trump Jr. wrote. „I’m sure your family really appreciates it, George. You’re a disgrace.“

To that, Conway said he was „not selling anything.“

„By the way, I’m not building a brand because I’m not selling anything,“ he wrote. „And I’m not selling anything because I’ve worked for three decades at a job that my father didn’t get me.“