“We’ve become a party of losers,” the conservative businessman Vivek Ramaswamy declared during the opening minutes of tonight’s Republican primary debate in Florida. He bemoaned the GOP’s lackluster performance in Tuesday’s elections, and then he identified the Republican he held personally responsible for the party’s defeats. Was this the moment, a viewer might have wondered, that a top GOP presidential contender would finally take on Donald Trump, the absent frontrunner who hasn’t deigned to join his rivals on the debate stage? Of course not. Ramaswamy proceeded to blame not the GOP’s undisputed leader for the past seven years but Ronna McDaniel, the party functionary unknown to most Americans who chairs the Republican National Committee. After calling on McDaniel to resign, Ramaswamy then attacked one of the debate moderators, Kristen Welker of NBC News, before turning his ire on two of his onstage competitors, Nikki Haley and Ron DeSantis. The moment was a fitting encapsulation of a debate that, like the first two Republican primary match-ups, all but ignored the candidate who wasn’t there. Five Republicans …