When asked whether the Obama administration’s Affordable Care Act was “here to stay,” Pence started off by calling for a federal expedited death penalty for mass shooters. When pressed again by the moderator, he turned the question of the ACA into one about Trump, suggesting that questions about health care policy should be a decision by Congress and the executive branch, while Trump wants to “consolidate power in the executive branch.” Pence said he’d like to “revive federalism in America.”
— Analysis by Leah Askarinam of 538

In our pre-debate 538/Washington Post/Ipsos poll, 9 percent of likely Republican primary voters were looking at “improving health care” as one of up to three most important issues (among a list of 20) in deciding which candidate to vote for in the primaries.

—Analysis by Holly Fuong of 538

Using military force in Mexico has become one of DeSantis's signature planks. In the past few months he's talked about sending special forces to confront the cartels, and didn't rule out firing missiles into Mexico either. It's a heavy-handed proposal that just a few years ago probably would have been major news but these days is pretty par for the course for more and more GOP officeholders.
-Jacob Rubashkin, 538 contributor

A plurality (31 percent) of Republican voters in a NewsNation poll from July said that drugs and substance abuse was the overall root cause of crime in their community. Twenty-three percent said the breakdown of the family unit was to blame, followed by 17 percent who listed underfunding of law enforcement. Systemic racism was the least mentioned issue, with just 3 percent of Republicans saying that it was the overall root cause of their community’s crime.
—Analysis by 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