The Sanders fundraising numbers confirm his status as a frontrunner in the increasingly crowded race for the Democratic nomination.
But O'Rourke's average $48 donation means he can keep coming back to his huge network of online supporters time and again - the same method that he used to set Senate fundraising records in his 2018 bid against Sen.
Although O'Rourke pulled in significantly less money than Sanders and Harris and did not reveal how many individual donors contributed to his campaign, he was only in the presidential race for 18 days before the March 31 fundraising deadline that marked the end of the first quarter of 2019.
The 37-year-old mayor of South Bend, Indiana, raised $7 million, calling it "a great look for our first quarter".
One reason the first quarter reports are so important is that the Democratic National Committee instituted a fundraising and polling policy that outlines who can qualify for Democratic primary debates.
Sanders campaign officials said his first-quarter haul, which included donations from all 50 states, will allow him to expand campaign staff and operations in early voting states in next year's primary contests, which kicks off in Iowa in February.
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The Sanders campaign has raised $32 million in total, including the $14 million that the campaign started with reported CBS News' Emily Tillett.
California senator Kamala Harris said on Monday night she raised $12m since announcing her presidential bid in January.
"The state of the Bernie campaign is strong and getting stronger by the day", Shakir said.
The town hall on jobs and the ecomony will be April 15 in Bethlehem, Pennsylvania, and be moderated by "Special Report" anchor Bret Baier and "The Story" anchor Martha MacCallum. Candidates are limited to collecting $2,800 from a single donor during the primary election. Elizabeth Warren (D-MA) standout. Harris is the only candidate of that group to release her fundraising totals.
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"There have been no high-dollar fundraising events, there's no kowtowing at the altars of the rich ... that is not this campaign", said Faiz Shakir, Sanders' 2020 campaign manager. "It may be others".