Sioux City, Iowa (CNN) California Sen. Kamala Harris raised less than $12 million in the second fundraising quarter of 2019, her campaign announced on Friday.

That figure is short of the $12 million the senator raised in the first three months of the year. But the second quarter number was bolstered by Harris' breakout debate performance in late June and the fact that the campaign raised $2 million in the wake of Harris' high-profile confrontation with Joe Biden. The campaign did not specify an exact amount for the quarter.

The Democratic presidential candidate's haul falls short of the $24.8 million raised by South Bend, Indiana, Mayor Pete Buttigieg , the $21.5 million that former Vice President Joe Biden raised and the $18 million haul from Vermont Sen. Bernie Sanders

The campaign said it raised money from more than 279,000 people in the second quarter, with 150,000 new donors contributing during that period. The average contribution was $39, the campaign said.

Harris, unlike Sanders and Massachusetts Sen. Elizabeth Warren, did spend considerable time raising money at top-dollar, high-profile events, especially in the second half of June as the campaign sprinted to post a strong fundraising number.

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