Rep. Ted Lieu (D-CA) engaged in a heated confrontation with U.S. Ambassador Mike Waltz.
The altercation occurred during a House Committee on Foreign Affairs hearing Wednesday over casualty figures from the Iran war, according to KCRA.
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When Waltz claimed only "over a hundred" U.S. troops had been wounded, Lieu corrected him sharply, "That number is wrong."
Lieu then cited the Pentagon's own Defense Casualty Analysis System showing 482 wounded.
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A total of 18 U.S. service members have been reported killed, including one whose death the Pentagon has not formally confirmed.
Lieu challenged the contradiction between President Donald Trump's March claim that Iran's military was "literally obliterated" and the mounting casualty toll.
"You should be ashamed! You don't know basic facts!" Claimed Lieu.
Waltz defended the damage assessment, claiming Iranian military capability was "massively damaged, if not completely ineffective."
"You should resign! You don't even care about the number of U.S. troops that were wounded!" Lieu said.
Another Republican colleague intervened and pushed to strike Lieu's words from the record.
"He lied to Congress!" Lieu said, "November is coming for you and this administration!"
Watch the video below.