While Christie has largely run in the primary as the biggest critic of Trump from within the GOP, polls show his message hasn't moved many voters.

Pressed on this on the debate stage, Christie sought to play down his low approval ratings from the party and suggested it was because he was telling the "truth" about Trump and Republicans, he said.

"He is unfit," he said of Trump, calling Trump a "dictator."

The former president -- his record, his rhetoric and his front-runner status in the race -- have to be discussed head-on, Christie said.

"There is no bigger issue in this race," he said.

-ABC News' Adam Carlson

Ramaswamy joined DeSantis in keeping the debate's early fire trained on Haley, accusing the former U.N. ambassador of bowing to corporate interests and taking money from prominent Democratic donors. Ramaswamy was fielding a question from Kelly on his own temperament and penchant for insults, which the SiriusXM host said has fluctuated from one debate to the next, and to which Ramaswamy acknowledged “there’s a time and place for everything.”

Ramaswamy then said Haley went from bankruptcy to being a high earner after her government service. Haley responded that her earnings in public life “may be bankrupt to him, but it wasn’t bankrupt to us.” She fired back at both Ramaswamy and DeSantis on her donors: “They’re just jealous. They wish they were supporting them.”

-ABC News' Chris Boccia

In his first answer, DeSantis dismissed the polls by saying that they showed that a “red wave” was going to happen in the 2022 midterms. In reality, though, most polls didn’t show that: For example, 538’s final average of polls of the generic congressional ballot said that Republicans were leading by just 1 point nationally. They ended up winning by 3 points.

-Analysis by Nathaniel Rakich of 538

The first question of the night went to DeSantis, who was asked about his stagnating poll numbers and whether voters are telling him "not no but not now."

"So we have a great idea and American voters actually make these decisions, not pundits or pollsters," he responded, adding he's "sick" of hearing about the polls.

"The voters are going to be able to speak and we're going to earn this nomination," he continued. "I am sick of Republicans who are not willing to stand up and fight back against what the left is doing to this country. You've got to be willing to stand strong and you've got to be willing to beat these people."

-ABC News' Alexandra Hutzler

As she called for a ban on TikTok, Haley said, “We now know that 50% of adults 18-to-25 think that Hamas was warranted in what they did with Israel. That’s a problem.”

When PolitiFact checked the polls in early November, we found a Harvard-Harris survey that found 48% of American 18-to-24 year olds said they sided with Hamas after the Oct. 7 terror attack on Israel that Israeli officials say killed 1,200 people.

However, that poll was based on a subsample of 199 people with a large margin of error.

The responses to other questions were also inconsistent with that view. Respondents in the subgroup said, by 2-1 margins, that Hamas’ Oct. 7 action "was a terrorist attack"; that the attacks "were genocidal in nature"; that Israel has "a responsibility" to retaliate "against Hamas terrorists"; and that Hamas "is a terror group that rules Gaza with force and fear and is not supported by them."
Three other polls found lower rates of support for Hamas, we reported.

-Analysis by Katie Sanders of PolitiFact