Clockwise, from top left: former N.J. Gov. Chris Christie, Florida Gov. Ron DeSantis, Vivek Ramaswamy, former U.N. Ambassador Nikki Haley and former President Donald Trump. Jim Watson/AFP via Getty Images; Eduardo Munoz Alvarez-Pool/Getty Images; Jim Vondruska/Getty Images; Mandel Ngan/AFP via Getty Images; Jim Watson/AFP via Getty Images hide caption
ramaswamy
Republican presidential candidates from left, former New Jersey Gov. Chris Christie, former U.N. Ambassador Nikki Haley, Florida Gov. Ron DeSantis, and businessman Vivek Ramaswamy during a Republican presidential primary debate hosted by NewsNation on Wednesday at the University of Alabama in Tuscaloosa, Ala. Gerald Herbert/AP hide caption
5 major takeaways — and one thing missing — from the fourth Republican debate
Republican presidential candidates from left, former New Jersey Gov. Chris Christie, former U.N. Ambassador Nikki Haley, Florida Gov. Ron DeSantis, businessman Vivek Ramaswamy and Sen. Tim Scott, R-S.C., participate in a Republican presidential primary debate hosted by NBC News Wednesday in Miami. Rebecca Blackwell/AP hide caption
From left, former Arkansas Gov. Asa Hutchinson, former New Jersey Gov. Chris Christie, former Vice President Mike Pence, Florida Gov. Ron DeSantis, businessman Vivek Ramaswamy, former U.N. Ambassador Nikki Haley, Sen. Tim Scott, R-S.C., and North Dakota Gov. Doug Burgum before a Republican presidential primary debate hosted by Fox News Channel Wednesday in Milwaukee. Morry Gash/AP hide caption