If he chose DeSantis as the next President then Trump is right.
Brings to mind the time Trump said he was mulling giving a pardon to Cassius Clay - a few decades after the Supreme Court ruled Clay didn't need a pardon.
Trump's ramblings are entertaining and I think his arm waving draws attention and probably does pick up some votes from people that are not dialed in.
Of course, some of us conservatives who have voted for Trump find things he says here and there worthwhile; no doubt about that.