Nikki Haley is going in on Tim Scott's tenure in D.C., asking him "Where have you been? Where have you been, Tim? We've waited 12 years!" without mentioning that she was the one who sent him to the Senate in the first place!
—Jacob Rubashkin, 538 contributor

DeSantis misleads on his position. DeSantis said Haley wasn't telling the truth about the Florida governor's actions on fracking. But it's DeSantis who is the one who needs to do more explaining.

Even before he entered office, DeSantis promised to urge Florida's legislature to ban hydraulic fracturing, or fracking, statewide.

"With Florida's geological makeup of limestone and shallow water sources, fracking presents a danger to our state that is not acceptable," the governor's campaign website read, adding that fighting fracking was a day one action.

Almost all of the action DeSantis took on fracking occurred shortly after he became governor. Just two days into his term, DeSantis issued an executive order with several water policy reforms and a line directing the Department of Environmental Protection to push to end all fracking in Florida.

The order instructed the department to "take necessary actions to adamantly oppose all off-shore oil and gas activities off every coast in Florida and hydraulic fracturing in Florida." Fracking injects water, chemicals and sand at ultrahigh pressure to force open layers of rock and unearth the oil (or sometimes natural gas) that's trapped inside.
-Analysis by Aaron Sharockman, PolitiFact

Americans of both parties don’t expect the national deficit to shrink, according to a June poll from the Pew Research Center. Seventy percent of respondents said they expected the annual deficit to grow in the next five years, including 80 percent of Republicans and 61 percent of Democrats. Just 11 percent of respondents said they thought the deficit would be smaller in five years, including 9 percent of Republicans and 14 percent of Democrats.
—Analysis by 538

A couple times tonight, Pence has made the case for a conservative, small-government focused GOP. But as evidenced by the crickets on his initial joke at the start of the debate, there just doesn't seem to be much appetite for him in the Trumpified Republican Party. This isn't a surprise really, given he started the campaign already a villain to many Republicans because Trump had blamed him for his defeat because Pence didn't try to block certification of Biden's victory. But Pence finds himself on the edge of the stage tonight because of his low polling level, and there has really been no good polling news for him recently. His horserace numbers are flat or going down and his favorability numbers among Republicans have worsened, with only Christie having more negative ratings. When might Pence actually leave the race? No idea. But in a field full of candidates who are struggling to have a path to winning, Pence is among those with the least signs of hope.

— Analysis by Geoffrey Skelley of 538

Several of the Republicans on stage touted their prioritization of border security should they win the presidency.

“What I’ll do on day one is sign an executive order to send the National Guard to partner with Customs and Border Patrol to make sure that we stop the flow of fentanyl over the border,” Christie said first. He expanded his answer to include his plans to fill the “6 million vacant jobs” in the country with legal immigrants.

“This border is going to be a day one issue for me as president,” DeSantis said, also noting that he’d administer the remain in Mexico policy, which requires migrants seeking asylum to remain in Mexico until their US immigration court date.

“We're going to declare a national emergency. Yes, we'll build the wall. We’ll do remain in Mexico,” DeSantis said.

Pence spoke about his role in negotiating the remain in Mexico policy of the Trump administration.

“I negotiated the remain in Mexico policy with the Mexican government. We used economic power to bring the Mexican government to the table. We build hundreds of miles of border wall and despite what's said here today, we reduced illegal immigration and asylum abuse by 90%. And as President of the United States, I can do it again,” he said. “I'm going to be ready on day one to get Congress to step up, secure the southern border of the United States.”

Haley cosigned on the Remain in Mexico Policy.

“Let's go back to Remain in Mexico policy,” she said. “Instead of catch and release. Let's go to catch and deport.”
Ramaswamy said that he was supportive of most of his opponents’ border positions, but that he’d go a step further: he’d end birthright citizenship for the kids of illegal immigrants.

“The Republicans on the stage are on the right side of this issue, militarize the southern border, stop funding sanctuary cities and end foreign aid to Mexico and Central America to end the incentives to come across,” Ramaswamy said.

--ABC News' Isabella Murray