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

Haley abruptly jumped in to hit Ramaswamy for his use of TikTok to appeal to voters, calling TikTok "one of the most dangerous social media apps," and saying she feels "dumber" every time she hears Ramaswamy talk. This moment, along with some others, revealed two things: First, Haley is on the more assertive side of the GOP foreign policy debate when it comes to dealing with China (a Chinese company owns TikTok), although Ramaswamy has said that he'd like to keep people under 16 from accessing social media. Second, she and the other Republicans on stage really don't like Ramaswamy. There've been a few other jabs at Ramaswamy tonight, but her line about feeling dumber was pretty telling.

— Analysis by Geoffrey Skelley of 538