Before the first break, we saw a debate about a sensitive issue on the trail devolve into a heated back-and-forth where Ramaswamy and Scott -- who usually maintains a cheery disposition on the trail and stage – were at each other’s throats.

In calling for ending birthright citizenship for the children of illegal immigrants in the United States, Ramaswamy invoked the 14th Amendment – which bestows the rights of citizenship on all who were born in the country, including freed slaves.

“Now the left will howl about the Constitution and the 14th Amendment. The difference between me and them is I've actually read the 14th Amendment. What it says is that all persons born or naturalized in the United States and subject to the laws and jurisdiction thereof are citizens,” Ramaswamy said.

Scott countered Ramaswamy's argument, noting that the clause had to do with slavery, not illegal immigration.

“I think it's simple that clearly it was designed for slavery and not for illegal immigration,” said Scott. Scott then pivoted to saying that Ramaswamy, who said during the last debate that the other candidates were ‘bought and paid for,’ was “just in business with the Chinese communist party. The exchange devolved into a heated back-and-forth, with Ramaswamy at one point interjecting, “thank you for speaking while I’m speaking.”

-ABC News' Isabella Murray and Oren Oppenheim

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