Top officials with Gov. Ron DeSantis’ campaign made the case to a gathering of top donors opposed to Donald Trump on Friday that rival GOP candidate Nikki Haley could not defeat the former president in a head-to-head matchup. If they wanted to stop Trump, they argued, the Florida governor remained their best bet. In another presentation made to the same group, Haley’s team argued the opposite. DeSantis’ campaign had flatlined, they insisted, pointing to data that showed that the former UN ambassador was ascendent and, therefore, the logical choice for the anti-Trump crowd. Haley’s team, according to a person familiar...