I was watching DeSantis tonight, and overall I think he did well. Despite perhaps underestimating the strength of his mic (he came across several times like he was yelling), DeSantis came across as confident and didn’t have any of the awkward moments that have gotten him bad attention on the campaign trail. In terms of substance, he turned the conversation toward issue areas that play to his strengths, like COVID-19, wokeness in education and natural disaster leadership.

That said, according to our FiveThirtyEight/Washington Post/Ipsos poll, Republicans already had pretty high expectations for DeSantis in this debate, so maybe his good performance won’t change their priors. (We’ll have to wait for the second wave of our poll to know for sure!) Really what I’m watching for after this debate is what happens to Ramaswamy. Like I wrote earlier, I think he’s the main story of this debate, but I don’t think I have a good handle on whether his performance will be received well or poorly.

-Analysis by Nathaniel Rakich of FiveThirtyEight

I think Geoffrey has this exactly right: It seemed a little like the candidates were playing pretend tonight by ignoring Trump. But they’re in a tough position, politically. Someone needs to go after Trump in order to open up space for another potential nominee, but going after Trump is also extremely unattractive to GOP voters. That combination keeps Trump in a strong position as the front-runner.

At this point, the question isn’t who will be the alternative to Trump, but whether Republicans will produce an alternative nominee to Trump at all. DeSantis needed to prove tonight that he could live up to the initial hype around him, that he was Republicans’ clear alternative to nominating Trump. But there didn’t seem to be a breakout moment for him. A handful of others — like Haley and Pence — had some strong moments, but we’ll have to wait for polling to see whether those actually resonated with voters. Otherwise, it’s more of the same – which is good news for Trump.

-Analysis by Leah Askarinam of FiveThirtyEight

It's not too surprising to me that Trump didn't come up much tonight except when explicitly pushed by the moderators. A lot of Republicans -- certainly GOP officeholders -- really don't like talking about Trump and never have. Tonight they were given the opportunity to pretend like Trump isn't in the race or the defining story of the election, and of course they took advantage of it. I bet it felt like a relief, even if it wasn't really moored in reality.
-Analysis by Jacob Rubashkin, Inside Elections

For the less-known candidates, debates are a crucial task to introduce themselves (in a positive light!) to the American people. The Google results posted here indicate that Ramaswamy made a big splash today (though I'm not sure how positive the reception will be). He and Scott currently have the strongest net favorable numbers among the GOP candidates. I don't think we heard enough from the latter candidate for his numbers to meaningfully change.

-Analysis by G Elliott Morris of FiveThirtyEight

As Republican candidates gear up for the debate, many have specific rituals they’ll be doing in preparation.

A campaign adviser for Haley said she will be listening to music, “lots and lots of music: Joan Jett, Queen, Def Leppard and [the] Go-Gos, to name a few.”

DeSantis has spent today with his wife, Casey, and their three children, though a campaign spokesman offered few details about how the family has spent their time.

Hutchinson posted a photo of himself preparing with notepad and laptop in hand.

“Some last minute studying and prep for tomorrow! It’s important to show up and be ready to answer the tough questions, you deserve nothing less than a leader ready to lead on day one,” Hutchinson captioned the photo online.

Pence will plan to spend time in prayer before the debate, while Scott took a tour of the debate stage, which he posted a video of, along with encouragements from his family, to X, formerly known as Twitter.

Others prepared physically, earlier this week.

Ramaswamy posted videos to X of himself playing tennis and him and his wife doing floor exercises in a gym throughout the lead-up week.

Burgum was playing a stress-relieving pickup game of basketball on the eve of the debate, according to a campaign press secretary, when he sustained an Achilles injury that called into question his ability to participate in the event.

He will be participating, albeit on crutches, per a photo posted to his X account.

-ABC News’ Gabriella Abdul-Hakim, Libby Cathey, Abby Cruz, Will McDuffie and Olivia Osteen