Tonight I’ll be keeping track of DeSantis, who, despite several campaign shakeups and a steady slide in both national polls and early state surveys remains the second-place contender in the GOP primary, and who will appear at center stage this evening. DeSantis didn’t have a breakout moment last debate, though he may have been hobbled by the embarrassment of his Super PAC publicly releasing his entire debate strategy just beforehand. This time around, he may need to make a larger splash to re-convince voters he’s the best (or only) alternative to Trump. The other candidates are now nipping at his feet — he’s not even polling second in New Hampshire and South Carolina anymore — and if he becomes just another member of the pack he could lose whatever luster he has left. He’s already (started taking shots at Haley)[], who had one of the better-reviewed first debate performances and who has seen some movement in the polls. With seven candidates on stage, he’ll have limited time to make his move. Will he finally go after Trump more forcefully, or does he feel enough pressure from below to focus on Haley and the others?

—Analysis by Jacob Rubashkin, 538 contributor

I'm closely monitoring Vivek Ramaswamy. The self-proclaimed outsider made a big splash during the last debate, garnering more media attention and generating higher Google search interest than his rivals. This triggered speculation that he might experience an upswing in the polls. However, his numbers have exhibited a consistent downward trend over the last month. It's plausible that the very characteristic that initially captivated debate viewers — his confrontational and too-smart-to-be-here style of arguing — may have, ironically, alienated the average Republican voter. I'll be looking for any shifts in his rhetorical approach or substantive positions during tonight's proceedings. Like his fellow candidates, Ramaswamy needs a substantial strategic maneuver to reshape the trajectory of his campaign.

—Analysis by G. Elliott Morris

I’m monitoring Pence tonight, and I’ve got to be honest: I don’t know how much he can do to increase his standing in the primary other than hope that other candidates implode. During the last debate, he had plenty of speaking time and, given Trump’s hatred for his former vice president, a pretty strong reception from the Fox News crowd. But still, nothing substantially changed. Voters expected him to give an average performance, and he pretty much delivered. He’s averaging less than 5 percent in national primary polling.

It’s not clear where Pence has room to grow. He’s better known than any candidate on tonight’s debate stage, and voters seem to have decided how they feel about him. If he’s a second-choice to similar candidates — others who, say, share his dislike of Trump but would nonetheless support him in a general election — Pence could benefit from a smaller field. So, the best thing Pence could do might just be to stay the course, continuing to get enough support to appear on a debate stage and waiting out lesser-known and underfunded candidates.

—Analysis by Leah Askarinam

I’ll be monitoring Haley and Christie tonight, who have taken different approaches to arguing for the Republican Party to move beyond Trump. While Haley has been somewhat critical of Trump, Christie has aggressively gone after him. Not coincidentally, Haley remains relatively well-liked among GOP voters, unlike Christie, who is persona non grata to most. I’m interested to see how Haley will seek to balance criticism (indirect or direct) of Trump with efforts to play to base voters, especially in polls of . As for Christie, I’m watching for how other candidates will use him as a foil to demonstrate their pro-Trump bona fides.

—Analysis by Geoffrey Skelley

Foreign policy isn’t quite dominating this debate, but U.S. policy towards China is a prominent theme, and Ramaswamy is bearing down a lot of attacks on that.

Ramaswamy and Haley had a heated moment on the debate stage over the issue of support for Ukraine – which Haley tied to China. When Ramaswamy argued against support for Ukraine, Haley jumped in, saying that a win for Russia is a win for China, and then accused Ramaswamy of liking China.

There was also the memorable TikTok exchange between the two. Haley sniped at Ramaswamy that "every time I hear you, I feel a little bit dumber for what you say” and that he can't be trusted as he justified his choice to join TikTok after being convinced by influencer and boxer Jake Paul to join despite previously calling it "digital fentanyl." TikTok was created by Chinese company ByteDance and lawmakers have scrutinized the app over security concerns. (Ads for TikTok are also airing on Fox Business Network during commercial breaks.)

Scott also accused Ramaswamy of being ‘bought’ by China. He was likely referencing Ramaswamy's company, Roivant Sciences, announcing 5-years ago that it was partnering with China state-owned investment company CITIC Group Corp

And Pence had a similar, pointed attack: “I'm glad Vivek pulled out of his business deal in 2018 in China -- that must have been about the time you decided to start voting in presidential elections."

It’s worth noting that Haley criticized Trump too on this front, in that case for not pursuing China aggressively enough on a host of issues: “This is where President Trump went wrong.”

– ABC News’ Kendall Ross, Libby Cathey, Soorin Kim, Abby Cruz, Nicholas Kerr, and Oren Oppenheim