New York Mayor Bill de Blasio has announced he is pulling out of the Democratic race for the White House.
"I have reached a point where I feel I have contributed all I can to this primary," the 58-year-old said in an email to supporters.
Observers say his campaign had failed to take off within a wide field of Democrats seeking to be nominated as the party's presidential candidate.
Despite him dropping out 19 more remain in the race.
Mr De Blasio attained a landslide victory in 2013 to become New York's first Democratic mayor in a decade.
He implemented a programme of free universal pre-school and made police wear body cameras in the most populous city in the US. Mr de Blasio was rewarded for his efforts at the polls: re-elected in 2017 with more 66% of the vote.
Still, New Yorkers did not get behind their mayor's presidential bid. A Quinnipiac poll from one month before he announced found that 76% of the city did not want him to run.
Announcing his decision to leave the race, Mr de Blasio thanked supporters, describing his presidential campaign as a "profound experience".
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