Former Vice President Joe Biden secured enough delegates to formally clinch the Democratic presidential nomination on Friday, setting the stage for a challenge to US President Donald Trump in the November election, Reuters reported.

A candidate needs at least 1,991 delegates to secure the nomination. Biden crossed the threshold when results came late on Friday after seven states and the District of Columbia held presidential primaries earlier in the week.

“It was an honor to compete alongside one of the most talented groups of candidates the Democratic party has ever fielded—and I am proud to say that we are going into this general election a united party,” Biden said on Friday.