Republican presidential candidate and Florida Gov. Ron DeSantis took a swing at Rep. Byron Donalds, R-Fla., on Thursday while continuing to defend the state's new school curriculum that has drawn criticism largely from the Biden administration and liberals across the country over its approach to slavery.

During a campaign stop in Iowa, DeSantis gave Donalds an ultimatum: Either he side with what he refers to as the "Free State of Florida," or he side with Vice President Kamala Harris "and liberal media outlets" who have railed against the curriculum, claiming it teaches students that slaves actually "benefited from slavery."

"So at the end of the day, you got to choose. Are you going to side with Kamala Harris and liberal media outlets? Are you going to side with the state of Florida?" DeSantis said. 

"I think it's very clear that these guys did a good job on those standards. It wasn't anything that was politically motivated. These are serious scholars," he said. "So don't side with Kamala on that, stand up for your state."

CRITICS UNLEASH ON KAMALA HARRIS' ‘EVIL,’ ‘ASTONISHING LIE’ ABOUT FLORIDA'S SCHOOL CURRICULUM ON SLAVERY

Kamala Harris, Ron DeSantis, Byron Donalds

Vice President Kamala Harris, Republican Florida Gov. Ron DeSantis and Rep. Byron Donalds, R-Fla. (Getty Images)

The new curriculum states, "Instruction includes how slaves developed skills which, in some instances, could be applied for their personal benefit." The line is just one out of 191 other listed items in the standards. The singling out of that one line by Harris during a trip to Florida last week led to countless critics accusing her of "brazenly lying," and "misleading" the American people. 

However, Donalds joined Harris by speaking out against the curriculum on Wednesday, arguing "the attempt to feature the personal benefits of slavery is wrong & needs to be adjusted." He called the rest of the standards "good, robust and accurate."

When reached for comment, Donalds' office pointed to comments he made during an appearance on Fox Business the morning after this article published. 

"Let's be very clear, I don't even have a criticism. This is a dumb story, and this was brought to us by the DeSantis campaign. They're the ones who made this an issue," Donald said. "I've been very clear that the standards are robust, they are accurate, they are good. Students in Florida will learn Black history. But my issue is with one sentence of the entire thing – one sentence of 200 pages." 

DESANTIS AIDES BATTLE BYRON DONALDS OVER FLORIDA EDUCATION POLICY: ‘DID KAMALA WRITE THIS?’

Vice President Kamala Harris

Vice President Kamala Harris rails against Florida's new Black history curriculum during a speech in Jacksonville, Florida on July 21, 2023. (Fox News)

He said it was "ridiculous" for the DeSantis campaign to make an issue out of his opposition to the slavery facet of the new standards, and declared that he had "always stood with Florida."

"I'm one of the members up here fighting hard against this radical agenda from the Biden-Harris administration. So my stance, and where I am politically is very, very clear. But if I have an issue with one sentence, I'm allowed to have that. The fact that they made this a story is dumb in my view," he added.

DeSantis at the podium during Iowa campaign stop

Republican presidential candidate Florida Governor Ron DeSantis speaks at U.S. Rep. Zach Nunn’s "Operation Top Nunn: Salute to Our Troops" fundraiser on July 15, 2023 in Ankeny, Iowa. (Scott Olson/Getty Images)

"We've now seen this Kamala Harris lie exposed about Florida's high school curriculum. She tried to demagogue something that had been done by a lot of Black history scholars consistent with Florida law, saying we wanted strong standards," DeSantis also said Thursday.

"[They were] trying to say that because they had a provision saying that there were slaves that developed skills, even though they said that was in spite of slavery, not because of slavery, that somehow that was whitewashing it when these are people who've been studying this, and they were very honest with everything and many of them themselves are African American," he added.

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Fox News' Jamie Vera and Elizabeth Elkind contributed to this report.