I think DeSantis was blackmailed or coerced into it. It was such a dumb move for him even attempt to run against Trump in Trumps new home state. I think they threatened his family or worse. They also hate what he is accomplishing in Florida, as most of his accomplishments go against the agenda. He's never seemed power hungry or attention seeking and he's no dummy, and he possibly ruined all future possibilities he may have had to run in the future. He could have made a solid VP candidate too had he took that path to the WH instead, he had to have known that.