It was a lively second debate, with lots of cross talk and arguing and challenging between candidates. Like in the first debate, Trump didn’t come up much. Christie remained the only one to really criticize him, and said he should not be part of the primary process. It’s easy to forget he’s the front-runner when you’re watching these candidates go after each other. They seemed more eager to attack each other than any front-runner in the presidential race.
— Analysis by Monica Potts of 538

We got glimmers of candidates attempting to narrow down the GOP primary field. Haley and Scott sparred over South Carolina politics, Pence criticized DeSantis’ spending in Florida, DeSantis criticized Trump’s stance on abortion, and just about everyone tried to take Ramaswamy down a peg (though that might have been a result of their frustration with him rather than actual political strategy). But what Republicans need in order to wage a credible challenge to Trump’s frontrunner status is to shake up the field, and I don’t know if we saw that tonight. It looked like we might get a little closer to winnowing down the field when moderator Dana Perino asked everyone to write down who they should “vote off the island” — but DeSantis, making a show of being above that sort of petty question, prevented us from getting any answers.
— Analysis by Leah Askarinam of 538

At several points during the second hour of the debate, it got particularly heated between former South Carolina Gov. Nikki Haley and someone she appointed to the U.S. Senate in 2013: Tim Scott.

Haley first went after Scott for not completing what he touted as his economic policy accomplishments.

“I appreciate him. We've known each other a long time. But he's been there 12 years and he hasn't done any of that. He has, they've only given four audits on time,” she said.

Then came a heated back-and-forth before Haley repeated, “Twelve years, where have you been? ... Bring it, Tim.”

The two also fought over Haley’s gas tax in South Carolina.

“​​I would love to finish my conversation with Nikki as it relates to the job that needs to get done. Nikki offered a 10-cent gas tax increase in South Carolina. Talk about someone who has never seen a federal dollar,” Scott said.

Haley then told Scott to do his homework regarding the spending and gas tax in South Carolina. He responded, “just go to YouTube.”

Haley ended the exchange by telling Scott that he was “scrapping right now” (as in scrambling).

“You are scrapping right now, you are scrapping. You know, I fought taxes, I cut taxes, I took care of South Carolina and you know it.”

They then got into a rift over a set of over $50,000 customized curtains for the State Department in the official residence of the ambassador to the United Nations. Haley was the first to live in the new residence.

–ABC News’ Abby Cruz, Gabriella Abdul-Hakim and Isabella Murray

After the moderator asked who should drop out of the GOP race, Christie said he'd have Trump drop out of the race if he had his pick because the former president has been so divisive. Ramaswamy offered an alternate view, arguing that Trump had been a great president, but that the America First movement isn't about one person but about "you," the American people. Once again, Christie differentiated himself by openly hitting Trump, something most of the other candidates shied away from tonight.

— Analysis by Geoffrey Skelley of 538

DeSantis is dodging the facts.

The Florida Board of Education set new social studies standards for middle schoolers July 19.

In a section about the duties and trades performed by enslaved people, the state adopted a clarification that said "instruction includes how slaves developed skills which, in some instances, could be applied for their personal benefit."

Experts on Black history said that such language is factually misleading and offensive.

Marvin Dunn, a psychology professor emeritus at Florida International University, has authored several books on the history of African Americans.

"Most enslaved people had no special skills at all that benefited them following their enslavement," Dunn said. "For almost all their skill was picking cotton. An enslaved man who was made to be a blacksmith might have been a king had he not been captured and taken from his country. Is he supposed to be grateful? Enslavement prevented people from becoming who and what they might have been and that was slavery's greatest injury to humankind."

Bruce Levine, an emeritus professor of history at the University of Illinois and author of "Half Slave & Half Free: The Roots of Civil War," was one of several scholars of the period who told PolitiFact that they rejected the value of spotlighting "skills" learned while enslaved.

"Very simply, can you imagine saying this about ‘skills’ developed in Nazi forced-labor camps?"
-Analysis by Aaron Sharockman, PolitiFact