DeSantis expressed support for using the U.S. military to combat drug cartels across the border.

"The president of the United States has to use all available powers as commander in chief to protect our country and the people," DeSantis said.

"When they are coming across, yes we are going to use lethal force," he continued -- a line he's used repeatedly throughout the campaign.

Activists have pushed back that his plan is inhumane and illegal.

-ABC News' Alexandra Hutzler

Martha MacCallum just asked about what to do about migrants already in the United States. In a July poll by The New York Times/Siena College, 39 percent of likely Republican voters say that they supported a “comprehensive immigration reform bill that provides a pathway to citizenship for all undocumented immigrants” in the United States, while 57 percent opposed such a bill. Support was weakest among Trump supporters (29 percent) compared with DeSantis supporters (48 percent) and voters who say they will vote for another candidate (50 percent).
-Analysis by FiveThirtyEight

While many candidates onstage have sparred with each other -- including Haley and Ramaswamy swapping sharp words on foreign policy -- Scott has yet to engage with any of the other candidates.

Much of his remarks have almost word for word repeated elements from his campaign stump speech. When asked about China, which he has addressed in other appearances, he pivoted to speaking about the U.S. border.

-ABC News’ Gabriella Abdul-Hakim and Oren Oppenheim

Asked to raise their hand if they would not increase aid to Ukraine, DeSantis did so, saying that "Europe needs to step up. They need to step up and do their job."

He argued: "I would have Europe pull their weight. ... Our support should be contingent on them doing it.

DeSantis -- who had received backlash from some other politicians for seemingly backtracking on support for Ukraine -- pivoted to say that he wasn’t going to send troops overseas but rather down to the Southern border.

-ABC News' Hannah Demissie and Will McDuffie

Money isn’t the be-all-and-end-all of political campaigns — but it sure helps, especially during the early phases of a primary. And in the 2024 pocketbook primary, the leaders so far are Trump (who raised $17.7 million in April, May and June) and DeSantis (who raised $20.1 million). These figures are striking, but you also have to account for how much time each candidate has been in the race. For instance, DeSantis jumped in in late May, so he had much less time in which to raise that money than Trump. Here’s a chart of who raised the most in the second quarter on a prorated basis.

But there’s also important context that those topline fundraising numbers don’t tell you. For instance, Burgum’s and Ramaswamy’s totals aren’t as impressive as they look — most of their fundraising came from their own wallets rather than from grassroots donors. Burgum self-funded $10.1 million of his $11.8 million haul, and Ramaswamy self-funded $5.0 million of his $7.7 million total.

On the other end of the spectrum, Scott is in better financial shape than his $5.9 million raised would suggest. That’s because he has more than $21 million cash on hand, thanks to money he carried over from his high-rolling Senate campaigns.

-Analysis by Nathaniel Rakich of FiveThirtyEight