Gov. Ron DeSantis of Florida raised $8.2 million in his first 24 hours as a presidential candidate, his campaign said on Thursday, a huge sum that cements his standing as the leading rival to Donald J. Trump.
Mr. DeSantis’s campaign began on Wednesday evening with a glitch-filled kickoff on Twitter, but that apparently did not slow donor enthusiasm. The campaign said on Wednesday that it had raised $1 million during a single hour.
The $8.2 million figure is more than the $6.3 million that Joseph R. Biden Jr. raised in his first 24 hours as a candidate in 2019, or the $6.1 million haul raised by former Representative Beto O’Rourke that same year.
The DeSantis sum includes both online contributions and donations secured by bundlers who had gathered on Thursday at the grand ballroom in the Four Seasons in Miami for what was called a Ron-O-Rama beginning at 10:30 a.m. to make calls to raise funds for the campaign.
A donor making calls in the room first disclosed that they had raised $8.2 million and Bryan Griffin, a spokesman for Mr. DeSantis, confirmed the figure. All the funds are so-called hard dollars that the campaign can use.
It was not immediately clear how many donors had contributed in the first 24 hours.
A super PAC supporting Mr. DeSantis is planning for a $200 million budget but campaign funds are far harder to raise because they face a strict donation cap.
The $8.2 million brought in by Mr. DeSantis far outpaces how Mr. Trump began his 2024 fund-raising in late 2022. Mr. Trump had raised about $9.5 million in the six weeks after he announced his campaign in mid-November.
