Democratic Senator Kirsten Gillibrand has ended her candidacy for the 2020 Democratic presidential nomination.
Mrs Gillibrand announced her decision to withdraw in an online video after failing to qualify for a third Democratic debate next month.
“After more than eight incredible months, I am ending my presidential campaign,” she said.
The 52-year-old has been a vocal advocate for women’s rights but her campaign failed to gain traction.
“I know this isn’t the result we wanted. We wanted to win this race,” she said. “But it’s important to know when it’s not your time, and to know how you can best serve your community and country.”
Mrs Gillibrand was appointed to her seat in the US Senate in 2009, when Hillary Clinton accepted the role of US secretary of state under former president Barack Obama.
Since then, she has won her re-election bids easily and remains popular in New York.
She had one of the largest financial pools to draw from of all the 2020 candidates, with around $10m (£7.7m) in her campaign coffers following her re-election last year.
She has been an outspoken supporter for the #MeToo movement as well as advocating for victims of sexual assault on college campuses and in the military.