Former Vice President Joe Biden is losing ground in the Democratic presidential primary race, according to a new Monmouth University poll released Monday.

Biden polled at just 19% — down from 32% from Monmouth’s last poll in June.

The drop in support now places Biden in a virtual three-way tie with Sens. Bernie Sanders and Elizabeth Warren, who topped the poll with 20% of support each from registered Democrats and Democratic-leaning voters across the country.

Support for Warren and Sanders rose since the last poll, up from 14% and 15%, respectively.

Biden lost support from voters across the board, including Democrats, black voters, men and women. The drop in those areas were shifted almost equally to Warren and Sanders.

Support for the rest of the Democrats in the packed primary field remained generally intact, including Mayor Bill de Blasio, who’s still polling at just 1%.

The latest poll was conducted from Aug. 16 to Aug. 20, and the results were based off 298 registered voters who identify as Democrats or lean left.

The poll has a plus/minus 5.7 percentage-point margin of error.