GOP billionaire reveals whether he would back Vance or Rubio in 2028

Asked by media figure Andrew Ross Sorkin on Wednesday whether he would back Secretary of State Marco Rubio or Vice President JD Vance in a 2028 Republican presidential primary contest, multibillionaire Ken Griffin indicated that he had backed Rubio in the past and would be predisposed to do so again, Axios reported.

The exchange occurred during an interview at the Allen & Company conference in Sun Valley, Idaho, according to the outlet, which noted that Griffin did not state what he would do to assist Rubio.

Axios reporter Alex Isenstadt noted in the article that in his 2025 book, “Revenge: The Inside Story of Trump’s Return to Power,” he reported that Griffin urged then-former President Donald Trump not to pick Vance as his 2024 running mate.

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Griffin supported Rubio when Rubio unsuccessfully sought the GOP presidential nod about a decade ago.

During the last White House election cycle, Griffin shelled out $5 million in donations to a super PAC supporting GOP presidential primary candidate former U.S. Ambassador to the United Nations Nikki Haley, Griffin’s spokesperson noted, The Associated Press reported.

Griffin said after the general election in 2024 that he voted for Trump.

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Rubio has indicated that he will not challenge Vance if the vice president throws his hat into the ring for the upcoming presidential race.

“If JD Vance runs for president, he’s going to be our nominee, and I’ll be one of the first people to support him,” Rubio said, according to a 2025 Vanity Fair report.

The founder and CEO of the hedge fund Citadel, Griffin is worth more than $51 billion, according to Forbes.

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