Sen. Kamala Harris has ended her campaign for the 2020 Democratic presidential nomination.
In an email to supporters, she said it was one of the hardest decisions of her life.
"But I want to be clear with you," she wrote, "I am still very much in this fight. And I will keep fighting every day for what this campaign has been about. Justice for The People. All the people."
Her decision to exit the race comes after months of trying to regain the momentum from her January campaign launch, which drew 20,000 people in her home state of California.
Harris, 55, positioned herself as a unifying candidate who could energize the Democratic Party's base of young, diverse progressives while also appealing to more moderate voters.
Yet after climbing into double digits in opinion polls following a strong debate performance in June, Harris slid out of the top tier in recent months and lags behind leading candidates' fundraising hauls.
Her campaign suffered from what allies and critics viewed as an inconsistent message. Her slogan "for the people" referred to her career as a prosecutor, a record the campaign struggled to pitch to the party's most progressive voters.
Through the summer, she focused on pocketbook issues and her "3 a.m. agenda," a message that never seemed to resonate with voters.
By the fall, she had returned to her courtroom roots with the refrain that "justice is on the ballot," both a cry for economic and social justice and a suggestion that she could "prosecute the case" against a "criminal" president.
She'll remain California's junior senator until her term ends, but vowed in her email Tuesday to "do everything in my power to defeat Donald Trump and fight for the future of our country and the best of who we are."