Because those Republican's let her go is why. A mistake in their rearview mirror now, but they are hoping to clear it all up with a Desantis or the like come 2024. If Trump runs that will be great, but the entire establishment will be trying to stop him for fear of the leftist hatred towards him, otherwise they don't want such a controversial figure to fight for America again, because they are the go along to get along gang now.
If Trump doesn't run Desantis gets my vote, because it appears that he has a level cool head when it comes to using great common sense in getting things done, and so far it's been without the left being able to use his past fault's against him. We definitely need that in the job.