Former President Barack Obama has also endorsed Vice President Harris.
Vice President Kamala Harris wrapped up what has been a whirlwind week in the presidential race with her campaign saying Sunday it has raised more than $200 million in less than a week.
On Thursday night, Harris met with Israeli Prime Minister Benjamin Netanyahu and took the lead in addressing the public about their discussions.
Harris has secured commitments from enough delegates to become the presumptive nominee if they all honor their commitment when voting, according to ABC News reporting.
Vice President Kamala Harris has signed candidacy declaration forms, she said in a post on social media Friday night.
"Today, I signed the forms officially declaring my candidacy for President of the United States," Harris said.
"And in November, our people-powered campaign will win."
South Carolina Rep. Jim Clyburn praised Transportation Secretary Pete Buttigieg as a potential vice presidential pick and extolled the importance and enthusiasm of the Obamas endorsing Harris.
During an interview with MSNBC on Friday, Clyburn went through the list of known options, noting his experience working with Minnesota Gov. Tim Walz and North Carolina Gov. Roy Cooper. He also mentioned Pennsylvania Gov. Josh Shapiro but did not mention Kentucky Gov. Andy Beshear.
Clyburn had the highest praise for Buttigieg, however, stating, “He would make an outstanding VP."
He outlined what he believes Harris’ team is looking for in a vice presidential candidate.
"They will look for what needs to be done in order to balance out the ticket, to energize or keep the energy going, and she will pick one that will help with that," he said.
Harris's campaign officially joined TikTok, and the first post already has more than 2.6 million views.
"Well I've heard that recently I've been on the 'For You Page,' so I thought I'd get on here myself," she said in the post.
Since President Biden's endorsement of Harris' candidacy, the @KamalaHQ account on TikTok has more than tripled (almost quadrupled) its following – growing from 440K followers to over 1.7 million followers.
But the campaign has faced criticism over its presence on TikTok after the Senate passed a bill that Biden signed into law requiring TikTok's Chinese parent company to sell or the app would be banned.
According to the measure, ByteDance must divest TikTok within a nine-month window from when the bill was signed into law in April.
In March, Harris responded to the criticism from TikTok users stating "We need to deal with the owner and we have national security concerns about the owner of TikTok, but we have no intention to ban TikTok."
-ABC News' Gabriella Abdul-Hakim, Fritz Farrow and Wil McDuffie
Several Black groups have responded to grassroots enthusiasm for Harris with new efforts to mobilize voters to the polls.
Quentin James founded Collective PAC, an organization that supports Black candidates at all levels of government around the country. James helped organize the Monday night Win with Black Men Zoom call -- telling ABC News that the call was just the beginning.
"As someone who's done a lot of fundraising, I've never raised $1.3 million over three or four hours from grassroots donors, I've never seen that kind of momentum," James said. "The energy is inspiring. Each one of those people on the call can organize 10 people or 100 people, and we hope to mobilize all of them."
-ABC News' Tommy Barone and Gabriella Abdul-Hakim
