Jeb Bush on Monday challenged Republican front-runner Donald Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE to a one-on-one debate.

Speaking to a gathering at the Forum Club in Palm Beach, Fla., Bush was asked by the moderator what he would say to Trump if he were to walk in the room at that moment.

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“Donald, I’ll take you on one-on-one in a debate, any time, any place,” Bush said. “You name it and I’ll do it.”

Bush has been on the attack against Trump in recent weeks.

At the Republican presidential debate in Las Vegas on Dec. 15, he rebuked the business mogul as a “chaos candidate” and declared, “You’re not going to be able to insult your way to the presidency.”

Trump, who has repeatedly mocked Bush as having “low energy,” responded by jabbing at Bush’s low polling numbers, saying he keeps inching closer and closer to the edge of the debate stage.

The two will meet again at the next Republican presidential debate on Jan. 14 in Charleston, S.C.