WASHINGTON — Senator Kamala Harris of California raised nearly $12 million in the past three months, her campaign said on Friday, a total that leaves her well behind her top rivals in the Democratic presidential primary’s money race.
Ms. Harris’s total for the second quarter of the year, which ended on Sunday, was padded by a strong finish. She collected more than $2 million in online donations in the first 24 hours after the start of last Thursday’s Democratic debate, as well as an additional $1.2 million online last weekend, her team said.
Ms. Harris’s second-quarter number is far below what some other first-tier candidates reported this week.
Mayor Pete Buttigieg of South Bend, Ind., raised $24.8 million in the second quarter, former Vice President Joseph R. Biden Jr. brought in $21.5 million and Senator Bernie Sanders of Vermont collected $18 million, their campaigns said this week. (Mr. Biden entered the race in late April, several weeks into the quarter.)
Many other candidates are expected to report raising far less. Senator Michael Bennet of Colorado, for instance, raised $2.8 million since entering the race in early May, his campaign said this week. The campaign of Gov. Steve Bullock of Montana announced Friday that he had raised more than $2 million since becoming a candidate in mid-May.
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The announcement by Ms. Harris came on the heels of a crucial moment for her campaign, when she confronted Mr. Biden on the debate stage over his comments about segregationist senators and his record on school busing. She has climbed in polls after her debate performance.
Ms. Harris raised less during the campaign’s second quarter than she did in the first, which she entered three weeks into January. In that quarter, she raised almost exactly $12 million, more than any other candidate aside from Mr. Sanders.
She has pulled in large sums from online donors while also aggressively raising money on the traditional fund-raising circuit, an approach that Mr. Buttigieg is also employing with great success.
The Harris campaign said Friday that she raised more than $7 million online during the second quarter.
Her team worked to capitalize on her strong showing at the debate last week. Her campaign said it received online donations from about 63,000 people in the first 24 hours after the debate, more than half of whom were first-time donors to her presidential bid. It was the best online fund-raising day of her campaign so far, her team said.
“As it has been from the beginning, this campaign is powered by the people,” said Juan Rodriguez, her campaign manager. “These resources will help expand Kamala’s growing strength in this primary.”
Ms. Harris’s team has spent the week since the debate aiming to extend her dispute with Mr. Biden over issues of race and school busing programs.
As post-debate polling showed her campaign on the rise, Ms. Harris’s aides have taken shots at Mr. Biden and his team on Twitter. And Ms. Harris said in Iowa that Mr. Biden “has yet to agree that his position on this, which was to work with segregationists and oppose busing, was wrong.”