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

Christie gets the first question out of the break on how to handle crime, and he made the case that he's the only person on stage whose done it as a former prosecutor. But he turned the question into an attack on Trump, calling out Trump for skipping out on the debate, saying that soon he'll be called "Donald Duck" for avoiding it. The thing is, Christie has essentially a 0 percent chance of winning the GOP nomination, so it's not especially interesting to hear him go after Trump. Earlier in the debate, DeSantis did echo an attack Christie made by hitting Trump for not being on stage to defend the former president's record on spending. More of those kind of dings from anyone besides Christie would be a development in this debate.

DeSantis stands by his decision to suspend two elected prosecutors in Florida, and says he'll bring civil rights cases (?) against local prosecutors as president.

-Jacob Rubashkin, 538 contributor

Haley abruptly jumped in to hit Ramaswamy for his use of TikTok to appeal to voters, calling TikTok "one of the most dangerous social media apps," and saying she feels "dumber" every time she hears Ramaswamy talk. This moment, along with some others, revealed two things: First, Haley is on the more assertive side of the GOP foreign policy debate when it comes to dealing with China (a Chinese company owns TikTok), although Ramaswamy has said that he'd like to keep people under 16 from accessing social media. Second, she and the other Republicans on stage really don't like Ramaswamy. There've been a few other jabs at Ramaswamy tonight, but her line about feeling dumber was pretty telling.

— Analysis by Geoffrey Skelley of 538