TUSCALOOSA, Ala.—Two Republican presidential contenders shared a stage with Vivek Ramaswamy and Chris Christie on Wednesday during the fourth GOP primary debate, co-hosted by the Washington Free Beacon. They wasted no time attacking one another. Former South Carolina governor and U.N. ambassador Nikki Haley drew fire early and often. The other legitimate contender, Florida governor Ron DeSantis, sought to portray her as someone who "caves" to Democrats on transgender issues and kowtows to Wall Street donors beholden to China.