White House chief medical adviser Anthony Fauci was caught on a hot mic Tuesday calling Sen. Roger Marshall (R-Kan.) “a moron” during his testimony before the Senate Health Committee on the omicron variant of the coronavirus.  

The tense exchange came as Marshall questioned Fauci about disclosing more of his personal finances to Congress. Marshall cited a Forbes story that reported that Fauci is the highest-paid federal employee, earning $434,312 in 2020. 

After the back-and-forth ended, Fauci could be heard muttering, “What a moron” and “Jesus Christ” in a clip tweeted by Mediaite.