Decorated Iraq War veteran Lt.
Alexander Vindman testified in a public impeachment hearing Tuesday.
Vindman is President Donald Trump's own top Ukraine expert.
According to CNN, the White House Twitter account attacked Vindman during his own testimony before Congress.
It was a remarkable broadside from the official voice of the executive branch.
The tweet quoted closed-door testimony from another witness who raised concerns about Vindman's judgement.
It was similar to a tweet Trump sent Friday, insulting ousted US Ambassador Marie Yovanovitch during her public hearing.
Both tweets were quickly raised by Democrats in their questioning.