A Democratic senator on Wednesday called on US President Joe Biden to ditch his reelection bid, capping a brutal day that saw mounting pressure from high-profile actor and donor George Clooney and party heavyweight Nancy Pelosi.

As the 81-year-old tried to show his leadership credentials at a NATO summit in Washington, domestic calls have been growing for Biden to quit following his disastrous debate performance against Republican challenger Donald Trump.

At least eight House Democrats have openly called on Biden to not seek reelection, but Peter Welch became the first in the Senate to explicitly do so as concerns rise over his age and fitness.

“For the good of the country, I’m calling on President Biden to withdraw from the race,” the Vermont senator said in an opinion piece in the Washington Post.

Biden has been trying to stem a growing tide of Democrats saying that he cannot win in November, but a steady drip of public revolt is squashing efforts to turn the page on the crisis.