Trump will have a primary with fewer competitors than 2016 (not hard). DeSantis is the clear runner up.
The liberal media and fox news will swoon over DeSantis. Everything Trump says will be rejectedout of hand by the media but DeSantis could say and mean the exact same thing Trump says and will be praised. Because only the character of Trump is what they reject, not his politics. Therefore, through DeSantis, Trump's politics will become normalized.
Trump still beats DeSantis and the media will try to denormalized Trump's politics again as though nothing happened.
She was extremely conservative until she got into politics. I assume she just realized her chances of winning were better as a Dem.