If it is about what is good for America. Trump does not run. If it is about Trump's ego, then Trump runs.
If DeSantis runs and has 100% unequivocal support from Trump, it's as close to a sure thing as there is in 2024. God, we still have over 2.5 years of this Goofus and his power hungry mob.
If Trump runs, it's probably 50/50. The blind hatred of the man is so deep and its not just blindly loyal Democrats. It's voters he needs to not show up because they don't care who will show just to vote against him and even voters that would normally be reliable Republicans who will vote Democrat. Like it or not, that is the reality of today. Why on earth gamble on a coin flip when there is a sure thing that is just as good on policy and better on dealing with the political realities of the day?