U.S. Vice President Kamala Harris has secured the support of enough Democratic delegates to become her party’s nominee against former President and Republican nominee Donald Trump, according to an Associated Press survey, as top Democrats rallied to her in the aftermath of U.S. President Joe Biden’s decision to drop his bid for re-election.

The quick coalescing behind Ms. Harris marked an attempt by the party to put weeks of drama over Mr. Biden’s political future behind them and to unify behind the task of defeating Mr. Trump with just over 100 days until Election Day.

Delegations pledge support for Kamala Harris

Prominent Democratic elected officials, party leaders and political organisations quickly lined up behind Ms. Harris and her campaign set a new 24-hour record for presidential donations on Monday.

Several State delegations met on July 22 to confirm their support for Ms. Harris, including Texas and her home State of California. By Monday night, she had the support of at least 2,471 delegates, according to the AP tally of delegates, more than the 1,976 delegates she’ll need to win on a first ballot. No other candidate was named by a delegate contacted by the AP.

California state Democratic Chairman Rusty Hicks said 75% to 80% of the state’s delegation were on a call Tuesday and they unanimously supported Ms. Harris. “I’ve not heard anyone mentioning or calling for any other candidate,” Hicks said. “Tonight’s vote was a momentous one.”

Ms. Harris has also secured endorsements from several leaders, including from Govs. Wes Moore of Maryland, Gretchen Whitmer of Michigan, J.B. Pritzker of Illinois and Andy Beshear of Kentucky, on June 22, thus shrinking the list of potential rivals. House Speaker Emerita Nancy Pelosi, who had been one of the notable holdouts, said she was lending her “enthusiastic support” to Ms. Harris’ effort to lead the party.

Still, the AP is not calling Harris the new presumptive nominee. That’s because the convention delegates are still free to vote for the candidate of their choice at the convention in August or if Democrats go through with a virtual roll call ahead of that gathering in Chicago.

The AP tally is based on interviews with individual delegates, public statements from state parties, many of which have announced that their delegations are supporting Ms. Harris en masse, and public statements and endorsements from individual delegates.

‘Fight for the future’

Worries over Mr. Biden’s fitness for office were replaced by fresh signs of unity after a seismic shift to the presidential contest that upended both major political parties’ carefully honed plans for the 2024 race.

Speaking to campaign staff in Wilmington, Delaware, Ms. Harris acknowledged the “rollercoaster” of the last several weeks, but expressed confidence in her new campaign team. “It is my intention to go out and earn this nomination and to win,” she said. She promised to “unite our Democratic Party, to unite our nation, and to win this election.”

Ms. Harris quickly leaned into the themes that will be prominent in her campaign against Mr. Trump over the coming 100 days, contrasting her time as a prosecutor with Mr. Trump’s felony convictions — “I know Donald Trump’s type,” she said — and casting herself as a defender of economic opportunity and abortion access. “Our fight for the future is also a fight for freedoms,” she said. “The baton is in our hands.”

Mr. Biden called into the meeting from his home in Rehoboth Beach, Delaware, where he is recovering from Covid-19, to lend his support to Ms. Harris. He planned to talk about his decision to step aside in an address to the nation later this week.

“The name has changed at the top of the ticket, but the mission hasn’t changed at all,” Mr. Biden said in his first public remarks since announcing his decision to step aside, promising he was “not going anywhere” and plans to campaign on Ms. Harris’ behalf. “It was the right thing to do,” he added.

As he handed off the mantle of leadership to Ms. Harris, Mr. Biden added: “I’m watching you kid. I love you.”

Ms. Harris was headed to the battleground state of Wisconsin on July 23 as her campaign for the White House kicks into high gear. The event in Milwaukee will be her first full-fledged campaign event since announcing her candidacy.

Locking up the nomination is only the first item on Ms. Harris’ to-do list — she must also pick a running mate and pivot a massive political operation that had been built to re-elect Mr. Biden to boost her candidacy instead.

Inheriting Biden’s legacy

Mr. Biden’s campaign formally changed its name to ‘Harris for President’ on June 21, reflecting that Ms. Harris is inheriting his political operation of more than 1,000 staffers and war chest that stood at nearly $96 million at the end of June. She added $81 million to that total in the first 24 hours after Biden’s endorsement, her campaign said — a presidential fundraising record — with contributions from more than 888,000 donors.

The campaign also saw a surge of interest after Ms. Harris took over, with more than 28,000 new volunteers registered since the announcement — a rate more than 100 times an average day from the previous Biden re-election campaign.

Ms. Harris, if elected, would be the first woman and first person of South Asian descent to be president.

The Democratic National Convention is scheduled to be held Aug. 19-22 in Chicago, but the party had announced it would hold a virtual roll call to formally nominate Biden before in-person proceedings begin. The convention’s rules committee is scheduled to meet this week to finalize its nomination process with a virtual vote as soon as Aug. 1, the party announced on Monday, with the process completed by Aug. 7.

“We can and will be both fast and fair as we execute this nomination,” Jaime Harrison, the Democratic National Committee’s chair, said on a conference call with reporters.

The party said the virtual roll call would feature multiple rounds of voting on nominees if multiple candidates meet the qualification threshold. To qualify, candidates must have the electronic signatures of 300 convention delegates.