Why….wouldn’t Trump run? Why do people think he’ll be prosecuted? He’s obviously running and winning.
You're sort of asking three different questions here.
"Will Trump run?" is up for debate since he clearly hated being President and is getting older and unhealthier.
"Will Trump win?" is relatively uncontroversial here, most if not all posters seem to agree that if Trump does run, he will win the nomination.
"Will Trump be prosecuted?" is irrelevant to the discussion since he can legally run from prison, and being prosecuted could make him a martyr.