• Virginia Gov. Glenn Youngkin said he will support Donald Trump if he becomes the 2024 Republican presidential nominee.
• Youngkin downplayed critics' concerns that the former president would seek "retribution" if granted a second term.
• Billionaire Home Depot co-founder Ken Langone, who was also on CNBC's program, expressed fear about how Trump might wield government power if elected again.

Virginia Republican Gov. Glenn Youngkin on Wednesday said he would support Donald Trump if the former president is the party's 2024 presidential nominee. He stopped short of endorsing Trump in the GOP primary, where Trump leads the field by more than 45 points.

"Listen, he and I have different styles, but his policies were effective and they worked," Youngkin said on CNBC's "Squawk Box."

A rising Republican star from a purple state, Youngkin reportedly considered entering the 2024 presidential race himself. He ultimately decided against it.

Now, as Trump racks up endorsements from Republican senators and governors, Youngkin remains hesitant to embrace his party's divisive leader. Trump endorsed Youngkin's successful run for governor in 2021.

Youngkin downplayed concerns that Trump would seek "retribution" if he were handed a second term, suggesting history and tradition would insulate American democracy.

"We didn't have kings, we didn't have dictators, and God bless George Washington for recognizing that and stepping down after two terms and establishing the role of the presidency," Youngkin said. "This is what America was built on, and this is what I think America will do going forward."

Appearing alongside Youngkin, Ken Langone, the billionaire Home Depot co-founder, did not share the governor's optimism.

"I worry if Trump wins that it's going to be four years of getting even, and that's scary, because we've got serious issues coming up that need to be addressed," Langone told the "Squawk Box" hosts.

Langone has endorsed former United Nations Ambassador Nikki Haley for the GOP nomination. But he is not the only one sounding alarms about Trump, whose campaign rhetoric vilifying his perceived enemies has increasingly been criticized as authoritarian.

The former president and current Republican primary front-runner in recent weeks has vowed to be his supporters' "retribution" and to be a dictator on "Day 1" if reelected.

Asked to respond to Langone's criticisms, Youngkin instead praised Trump for his political results.

"I think what we saw during President Trump's term was that he literally governed in a way that delivered good policy outcomes," Youngkin said. "There was a great economy, we had a secure border, we understood what projecting strength around the world meant. That's the way he governed before."

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