Haley, as a former ambassador, made an impassioned case for the U.S. continuing military and financial aid to Ukraine amid Russia's invasion.

"When you look at the situation, you have a pro-American country that was invaded by a thug," she said. "You want to talk about what has been given to Ukraine, less than 3.5% of our defense budget has been given to Ukraine. If you look at the percentage per GDP, 11 of the European countries have given more than the U.S."

She was interrupted by Ramaswamy, who is opposed to further assistance, and the two had a fiery back-and-forth.

Haley told the political newcomer: "You have no foreign policy experience and it shows."

On Ramaswamy's approach to Putin, Haley said: "This guy is a murderer and you are choosing a murderer."

-ABC News' Alexandra Hutzler

Scott just took a question about national security and turned it into one about immigration, saying our Southern border is the greatest national security threat. Ramaswamy did something similar earlier. If you look at the polling, it’s easy to see why: According to our FiveThirtyEight/Washington Post/Ipsos poll, 36 percent of Republicans identified “controlling immigration” as one of their top issues in the primary — second only to inflation and rising prices.
-Analysis by Nathaniel Rakich of FiveThirtyEight

Ramaswamy came out hitting the other candidates, saying he's the only one who hasn't been bought and sold. When it came to his comments on Ukraine, though, Pence and Haley are hitting back. "You have no foreign policy experience and it shows," Haley said. As Jacob said, his quick rise is drawing attacks, especially on his lack of political experience.
-Analysis by Monica Potts of FiveThirtyEight

Haley tried to go after DeSantis as he was answering a question on Ukraine but it didn't generate the same back-and-forth as with Ramaswamy, and the moderators quickly moved on to another matter. Clearly Ramaswamy -- his lack of political experience and rapid rise in the polls -- has gotten under the skin of the other candidates on the stage and they're going out of their way to take him down a peg even if it means forgoing opportunities against the ostensible polling leader.
-Analysis by Jacob Rubashkin, Inside Elections

Trump campaign surrogates like Rep. Marjorie Taylor Greene, R-Ga., have been spending the day on media row touting Trump’s policies to various news outlets. She has plans to host a post-debate analysis show with Rep. Matt Gaetz, R-Fla., on conservative outlet Right Side Broadcasting Network.

Donald Trump Jr. and Kimberly Guilfoyle have also been live-streaming for his podcast outside the debate arena since Wednesday afternoon, joined by other Trump surrogates like Greene, Gaetz, and Kari Lake.

On the podcast, Donald Trump Jr., Guilfoyle and various surrogates sought to downplay the debate, calling the stage a “VP debate,” a “kids’ table” at a Thanksgiving dinner, and a “secretary of education debate.”

Other candidates have criticized the former president for declining to face them and make his pitch to voters in Milwaukee.

Lake on the Donald Trump Jr. podcast also said she spoke with the former president earlier on Wednesday afternoon about the pre-taped Tucker Carlson interview scheduled to be released Wednesday, saying it will be a “good interview.” She said the elder Trump sounded “really good” in the afternoon but told her that “things are going to get worse before they get better.”

-ABC News' Soo Rin Kim and Lalee Ibssa