Republican U.S. presidential candidates participate in their fourth debate of

Former New Jersey Governor Chris Christie, former U.S. Ambassador to the United Nations Nikki Haley, Florida Governor Ron DeSantis and tech entrepreneur Vivek Ramaswamy stand at their podiums at the start of the fourth Republican candidates’ debate of the 2024 U.S. presidential campaign hosted by NewsNation at the University of Alabama in Tuscaloosa, Alabama, U.S. December 6, 2023. REUTERS/Brian Snyder