Pete Buttigieg, the former Indiana mayor who made an ambitious run for president, has announced he is ending his campaign for the White House.
The 38-year-old became the first openly gay presidential candidate from a major party when he announced he was running for the Democratic nomination.
But despite a successful start, his campaign lost momentum in recent weeks.
His decision to drop outcomes ahead of a key day on Tuesday in the Democratic race to take on Trump.
Fourteen states will vote on Super Tuesday, by the end of which staunch left-winger Bernie Sanders could have an unbeatable lead and be a step closer to the nomination.
His departure leaves six Democrats still in the running – Joe Biden, Mr. Sanders, Michael Bloomberg, Elizabeth Warren, Amy Klobuchar, and Tulsi Gabbard.