Hugh Hewitt implored former President Donald Trump not to endorse former Missouri Gov. Eric Greitens for the U.S. Senate race next year.

The conservative radio host told Trump on his show Wednesday that endorsing Greitens would be a big mistake that would cost the Senate seat at the expense of the Republican Party. Republican Sen. Roy Blunt currently holds the seat but is not seeking reelection.

"Please don’t endorse Eric Greitens. That’s a nightmare, Mr. President," Hewitt said. "We’ll lose that seat. But that’s Hugh Hewitt’s opinion, not yours."

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Trump said Hewitt's request was interesting and noted Greitens is leading in the polls "by quite a bit."

He did not reveal whether he would endorse Greitens. Trump also did not comment on his own political future, including whether he will run in the 2024 election.

Greitens resigned as governor in 2018, a year and a half into his term, amid sexual and campaign finance misconduct allegations.

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Other candidates in the GOP primary race include Missouri Attorney General Eric Schmitt, Reps. Vicky Hartzler and Billy Long, and Mark McCloskey, a St. Louis attorney who was pictured alongside his wife brandishing guns at Black Lives Matter protesters near his home last year. Several independents and Democrats are also vying for the seat.

The Senate currently has a 50-50 split, with a tiebreaker in Vice President Kamala Harris.

Editor's note: This report has been corrected to say Eric Greitens is vying for the seat held by Sen. Roy Blunt, who is not seeking reelection. An earlier version incorrectly said Sen. Mike Rounds.