Republican presidential candidates are gearing up for the fourth and final primary debate in Tuscaloosa, Alabama with the January 15 caucuses fast-approaching. Here's a look back at some memorable moments from the previous three debates.

Former N.J. Gov. Chris Christie discussed his 2024 presidential campaign, former President Donald Trump and more on "Face the Nation" Sunday.

Former United Nations ambassador Nikki Haley, Florida Gov. Ron DeSantis, former New Jersey Gov. Chris Christie, and tech entrepreneur Vivek Ramaswamy will face off on Dec. 6 in the fourth GOP presidential primary debate.

Hosting the debate is 'a great honor' and thousands of UA staff have been involved in the preparations for hosting at the Moody Music Building.

Learn more about which GOP presidential candidates qualified for the fourth Republican primary debate on NewsNation.

Four Republican presidential hopefuls will take the stage on Wednesday night for the fourth GOP primary debate, the Republican National Committee announced Monday. Why it matters: It will be the smallest debate stage yet — down from the five candidates who qualified for the third debate — and comes just over a month out from the Iowa caucuses.

As GOP presidential candidates rally in Iowa six weeks before the Iowa Caucus, former President Donald Trump remains at the top of the polls, with one poll showing Ron DeSantis and Nikki Haley tied for second.