Harris hit the $US1 billion mark in less than 80 days, according to the people with knowledge of her haul, who were not authorised to speak publicly about it.

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After she replaced Biden as the de facto Democratic nominee July 21, the outburst of online donations was organic and enormous. Harris raised $200 million in her first week — more than Biden had raised with the party in the last six months of 2023.

In fact, Harris has raised so much money that, in an unusual move in early September, she directed her joint accounts with the party to send $US25 million to other party committees focused on down-ballot races for the House, Senate, governor and even state legislatures.

Much of the funds have come from online contributors.

In the 80 full days since she declared her candidacy, the Democratic donation platform ActBlue has processed about $US1.5 billion in contributions to Democratic candidates and causes, compared to $US587 million ActBlue had received in the preceding 81 days, according to the site’s online tracker.

Harris’ fundraising has been led by the same team that had been previously raising money for Biden.

Colleen Coffey and Michael Pratt are her finance co-directors, focusing on raising money from larger donors. Jessica Porter is her grassroots fundraising director, who oversees the online operation. Rufus Gifford is the finance chair for the Harris-Walz campaign, and Chris Korge is the finance chair for the Harris Victory Fund with the party.

Harris has supplemented that team with several new fundraisers with close ties to her, including Stephanie Daily Smith, Stefanie Roumeliotes and Kristin Bertolina Faust, whom she named a co-finance chair with Gifford.

This article originally appeared in The New York Times.