Rep. Lloyd Doggett (D-TX) became the first Democratic member of Congress to call on President Joe Biden to drop out of the race.
Doggett cited poor debate performance and disappointing polling.
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"President Biden saved our democracy by delivering us from Trump in 2020. He must not deliver us to Trump in 2024," the lawmaker said in a statement.
"Recognizing that, unlike Trump, President Biden's first commitment has always been to our country, not himself, I am hopeful that he will make the painful and difficult decision to withdraw. I respectfully call on him to do so."
Earlier in the day, Rep. Mike Quigley (D-IL) also expressed skepticism about the presumptive Democratic nominee, though he stopped short of asking Biden to quit.
"But I think he has to be honest with himself," he said on CNN. "This decision he's going to have to make, he clearly has to understand, I think what you're getting to hear is that his decision not only impacts who's going to serve in the White House the next four years but who's going to serve in the Senate, who's going to serve in the House, and it will have implications for decades to come."
