Sen. Kamala Harris formally ended Tuesday her faltering bid to become the Democratic nominee to take on U.S. President Donald Trump during next year’s presidential elections.

Harris announced her decision in a post on the Medium website, calling it “one of the hardest decisions of my life.”

“To you my supporters, it is with deep regret — but also with deep gratitude — that I am suspending my campaign today.,” the senator from California wrote, citing in particular financial shortfalls that are preventing her from staying in the race.

“I want to be clear: although I am no longer

Read more: US: Kamala Harris drops out of 2020 White House race