Mentions of Ronald Reagan, president of the U.S. from 1981 to 1989, so far tonight: 20.
Mentions of Donald Trump, president of the U.S. from 2017 to 2021 and current candidate for president: 12.

—Analysis by Nathaniel Rakich of 538

Nathaniel, I'd imagine Vivek's actual words spoken puts him even further ahead of the other contenders on stage. He even acknowledged he was "in a hurry" earlier in the debate, perhaps trying to inject a little humility and self-awareness into his image, especially after his unfavorability rating shot up after the first debate.
-Jacob Rubashkin, 538 contributor

Ramaswamy differed with some of his opponents on the issue of Ukraine, arguing the United States should limit its support for the country in its fight against Russia.

“The reality is just because ... Putin's an evil dictator does not mean that Ukraine is good. This is a country that has banned 11 opposition parties,” Ramaswamy said.

That’s accurate. But it needs context.

Ukraine banned 11 pro-Russian parties — the largest of which occupied 44 out of 450 seats in parliament, according to Radio Free Europe. The leader of the party, Viktor Medvedchuk, is aligned with Putin. Putin is the godfather of Medvedchuk's daughter, Radio Free Europe reported.
-Analysis by Aaron Sharockman, PolitiFact

Burgum gets a question for the first time in a while — on farmers — and turns it into a long foreign-policy answer. He’s trying to remain relevant but always seems to be late to the party on a topic that has already been talked out. According to The New York Times, he has spoken the least tonight: just five minutes and 49 seconds. By contrast, Ramaswamy has spoken the most: nine minutes, 25 seconds.

—Analysis by Nathaniel Rakich of 538

At several points during the second hour of the debate, it got particularly heated between former South Carolina Gov. Nikki Haley and someone she appointed to the U.S. Senate in 2013: Tim Scott.

Haley first went after Scott for not completing what he touted as his economic policy accomplishments.

“I appreciate him. We've known each other a long time. But he's been there 12 years and he hasn't done any of that. He has, they've only given four audits on time,” she said.

Then came a heated back-and-forth before Haley repeated, “Twelve years, where have you been? ... Bring it, Tim.”

The two also fought over Haley’s gas tax in South Carolina.

“​​I would love to finish my conversation with Nikki as it relates to the job that needs to get done. Nikki offered a 10-cent gas tax increase in South Carolina. Talk about someone who has never seen a federal dollar,” Scott said.

Haley then told Scott to do his homework regarding the spending and gas tax in South Carolina. He responded, “just go to YouTube.”

Haley ended the exchange by telling Scott that he was “scrapping right now” (as in scrambling).

“You are scrapping right now, you are scrapping. You know, I fought taxes, I cut taxes, I took care of South Carolina and you know it.”

They then got into a rift over a set of over $50,000 customized curtains for the State Department in the official residence of the ambassador to the United Nations. Haley was the first to live in the new residence.

–ABC News’ Abby Cruz, Gabriella Abdul-Hakim and Isabella Murray