In closing remarks, Christie contended that Trump will be a felon by November 2024 given the four criminal cases against him. He has pleaded not guilty.

"I want you to all kind of picture in your mind Election Day. You'll all be heading to the polls to vote. And that is something Donald Trump will not be able to do, because he will be convicted of felonies before then and his right to vote will be taken away," Christie said.

The statement drew loud boos from the crowd -- a recurring theme for Christie's comments about Trump.

"You can boo about it all you like and continue to deny reality. But if we deny reality as a party, we're gonna have four more years of Joe Biden," Christie said.

-ABC News' Meredith Deliso

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

Recent polling found that Americans believe Taiwan is an ally and important to U.S. security. In September, the Chicago Council on Global Affairs found that 65% of Americans felt that the country's security relationship with Taiwan does more to strengthen national security than weaken it. And large majorities backed supporting Taiwan in different ways if China were to invade the self-governing island, save sending U.S. forces to the theater. Overall, 78% of Americans would want the U.S. to airlift food and medicine to Taiwan, 75% would want economic and diplomatic sanctions on China and 62% would want the U.S. to send more arms and military supplies to Taiwan. But in terms of military intervention, half said they would support using the U.S. Navy to break a blockade, while 56% opposed sending U.S. troops to Taiwan.

--Analysis by Geoffrey Skelley of 538

Ramswamy defended his position that the U.S. should arm the Taiwanese people with assault-style weapons, despite a Taiwanese zero-gun policy, and added the U.S. should “for the foreseeable future” promise to defend the self-governing island from China, which claims it as its own.

Ramaswamy drew a contrast with DeSantis, who hewed closer to the strategic ambiguity behind America’s longstanding deterrence posture. Haley, separately, said America must continue to defend Ukraine as a signal to Beijing that it can’t attack Taiwan and said the U.S. should not depend on China for national security.

Christie said he would engage militarily if Taiwan is invaded by China.

-ABC News’ Chris Boccia

At the beginning of the year, DeSantis was the clear runner-up in the Republican presidential primary field: He was averaging above 30% in national polls, only about 10 points behind Trump. But DeSantis’ star has fallen the more voters have gotten to know him, it seems, and another candidate is now on the verge of overtaking him as the most viable Trump alternative: Haley.

As of Tuesday, Haley was at 11% in 538’s national polling average of the Republican primary -- just 2 points behind DeSantis for second place. And she’s doing even better in early primary states. She’s polling at 15% in Iowa, and she’s comfortably in second place in New Hampshire (19%) and South Carolina (21%).

She also recently secured the endorsement of Americans for Prosperity Action, a conservative group affiliated with Republican megadonor Charles Koch that is known for its sophisticated political operation.

Why has Haley been on the upswing? The simplest explanation is these debates. On the day of the first debate, she was averaging just 3% in national polls. But according to a 538/Washington Post/Ipsos poll conducted both before and after that debate, Republicans who watched said Haley was one of the strongest performers, and the share who said they were considering voting for her shot up by 17 points.

Republican debate watchers also rated Haley as the second-best performer in the second debate and the strongest performer in the third debate. Probably not by coincidence, her polling numbers have been steadily increasing ever since.

Of course, Haley fans shouldn’t get too giddy. She (and DeSantis) are still far behind Trump both nationally and in the early primary states. Even if Haley does overtake DeSantis and winds up being the last non-Trump Republican standing in the primary, it won’t matter if Trump is winning every state by double digits.

-Analysis by Nathaniel Rakich of 538