DOVER, DELAWARE - In his third run for the White House, Joe Biden has finally won a presidential primary in his home state.

Biden, the last man standing from a Democratic field that once numbered more than 24 candidates, won Delaware's Democratic presidential primary on Tuesday, beating Vermont Sen. Bernie Sanders and Massachusetts Sen. Elizabeth Warren.

Sanders and Warren both suspended their campaigns months ago, but their names remained on Tuesday's ballot because they did not officially withdraw as candidates in Delaware by the March 6 deadline. Warren suspended her campaign just one day before the deadline, while Sanders didn't stop campaigning until April.

Pete Buttigieg and Tom Steyer also had filed for Delaware's primary but withdrew their names in early March.

Biden also won New Jersey's mostly mail-in Democratic presidential primary.

Biden faced Sanders on the ballot Tuesday, even though Biden has accumulated enough delegates to become the party's presumptive nominee.

New Jersey's already-late primary got pushed a month later because of the COVID-19 pandemic, and Democratic Gov. Phil Murphy mandated that the election take place mostly by mail-in ballots.

New Jersey's 14 electoral votes have gone to Democrats in every presidential election since 1988.

Tuesday's victories give Biden another notch in his Democratic delegate belt, although the former vice president became his party's presumptive nominee months ago after Sanders dropped out of the race.

Biden first ran for president in 1987 but dropped out before the first contests of the 1988 primary campaign amid reports of plagiarism in political speeches and while he was in law school at Syracuse University. Jesse Jackson went on to win Delaware's Democratic caucus.

Biden also sought the 2008 Democratic presidential nomination but dropped out of the race after finishing fifth in the Iowa caucus with only 1 percent of the vote. He nevertheless remained on the Democratic primary ballot in Delaware and garnered almost 3 percent of the vote, well behind future boss Barack Obama and runner-up Hillary Clinton.

Meanwhile Tuesday, President Donald Trump won Delaware's GOP presidential primary over Roque "Rocky" De La Fuente, a California businessman and perennial gadfly candidate.

The primary elections were open only to registered Democrats and Republicans.

Tuesday's election was the first in Delaware to feature universal absentee voting, with absentee ballots having been sent to every registered Democrat and Republican in the state. Under Democratic Gov. John Carney's emergency coronavirus declarations, any voter could choose "sick or temporarily or permanently physically disabled" and be eligible to vote absentee.

Because of the coronavirus, Delaware election officials also limited the number of polling places for Tuesday's primary. Kent County, with more than 94,000 eligible voters, had only 12 locations where people could cast ballots in person. Sussex County, with more than 133,000 registered Democrats and Republicans, had 24. New Castle County had 46 polling locations available for more than 315,000 voters. In the 2016 presidential primary, Delaware voters cast ballots at 313 precincts.