Final thoughts: This debate might cause ripples, but these candidates need a tidal wave
The Iowa caucuses take place on Jan. 15, and it was clear from Wednesday's contentious interactions that we're getting down to the wire now.
At this point in the race, DeSantis and Haley are best positioned to grab the mantle of "Trump's main opponent," so it was no surprise to see them take big verbal swings at each other over and over on the stage. However, each candidate needs to attract both primary voters who don't support Trump and some of the former president's supporters, a difficult challenge. And with Trump leading by around 25 points in both Iowa and New Hampshire polling, changes at the margins aren't enough.
From that perspective, DeSantis made the case that he's got a conservative track record full of election victories and policy wins. Haley, meanwhile, spent much of the debate on the defensive, but she argued for an assertive foreign policy, greater immigration restrictions and reduced regulations to spur home building.
Their rhetoric may win over a few voters who aren't in Trump's camp, although Christie's showing probably satisfied his small anti-Trump block of supporters. But did any of this convince some of Trump's supporters to break with the former president? Probably not many.
That's a big problem for DeSantis and Haley -- they not only need to gain, they also need Trump to seriously lose ground.
-Analysis by Geoffrey Skelley of 538