For the past few years, they were all in lockstep behind Trump. Then he started visibly losing, which is the one thing they can't tolerate. Nobody else has stepped up yet with enough force of personality to drag them back into line. Even opposing the Dems only goes so far when they don't have anyone to tell them how.
The only other candidate right now looks like DeSantis, who's basically Trump if he actually knew what he was doing, so we'll see how the future goes, but right now they're an army of idiots without a general.