You mean like if the majority of voters think he’s too old and too stubborn on the vaxx and they all vote for someone like DeSantis in the primary? Those seem like reasonable conclusions for who people might choose as their candidate, and they wouldn’t be too happy with a “sore loserman” sabotaging the general election at that point.
if he is allowed to run in the primary fine, who ever wins wins that’s politics
but...
if they try some trick to keep him out, all bets are off