Ramaswamy and Haley traded shots on his Israel and Russia-Ukraine views, with Ramaswamy interrupting Haley and claiming she has been saying misleading things about his proposals on Israel. Ramaswamy has called for winding down aid to Israel after integrating the country more into the region.

"I wish you well on your future career on the boards of Lockheed and Raytheon,” Ramaswamy quipped, referring to the aerospace and defense companies.

Haley struck back: "You have no foreign policy experience and it shows," she said -- and was met with cheers and applause from the audience.

-ABC News’ Abby Cruz

Trump wasted no time attacking other Republican candidates during his pre-taped interview with former Fox News host Carlson.

"I'm saying, do I sit there for an hour or two hours, whatever it's going to be and get harassed by people that shouldn't even be running for president?" Trump said.

The 46-minute interview -- released on Carlson's X account as the GOP debate got underway -- is being seen among the campaigns as an attempt to counter-program the first debate among 2024 Republican presidential candidates on Fox News.

Read more about the interview here.

-ABC News' Lalee Ibssa , Soo Rin Kim and Meredith Deliso

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

Why are voters so dissatisfied with Biden’s economy?

That’s one of the questions that will shape the 2024 race as Republicans gear up to select a presidential challenger. Right now, only 36 percent of American adults approve of Biden’s handling of the economy, according to an AP-NORC poll from Aug. 10-14. Similarly, a Fox News poll from Aug. 11-14 found that only a quarter of American voters say Biden’s policies have made the economy better. Some of this is affected by partisanship: A large majority of Republicans disapprove of his handling of the economy, but Democrats aren’t over the moon either, with only about two-thirds approving, according to the AP poll.

It’s tempting to think this is all a hangover from last summer’s doldrums, when inflation peaked at 9.1 percent last June. Consumer prices might be the most obvious way that everyday Americans interact with the economy. Inflation today is still 3.2 percent higher compared to this time last year, which means prices are still above what they were before the pandemic.

The fact that the job market remains strong, with unemployment at historic lows and wages rising, hardly makes an impact when people feel like they’re spending more every time they go to the grocery store and are struggling to pay down debts amid high interest rates. But the truth is, Americans’ view of the economy overall was low when Biden took office during the wobbly beginnings of the COVID-19 recovery, and has never risen above 50 percent.

What do people want from federal policy? They support measures such as taxing the wealthy and corporations more — more than three-quarters of all Americans approve, including 90 percent of Democrats and 63 percent of Republicans, according to an Ipsos/Reuters poll. As it happens, that policy is part of Biden’s Inflation Reduction Act, his signature inflation-fighting legislative win, but less than half of Americans say they know about the bill.
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Biden is working to promote the Inflation Reduction Act and other legislative accomplishments as part of “Bidenomics,” but the fact that there’s a gap between what Biden is doing about the economy and how people feel about it leaves plenty of room for Republican attacks. Indeed, DeSantis has promised to roll back Biden’s economic policies. And the polling so far suggests that, even if the economy improves even more in the next year, Biden might not get credit for it.

-Analysis by Monica Potts of FiveThirtyEight