Only because none of the other assholes got prosecuted.
That's a flaw in the Good Ole Boy Network of ex-Presidents, where Obama and Bush Jr can have a beer over illegal drone strikes and wiretaps together. It has nothing to do with which Presidents actually committed crimes.
We should be gleeful that Lady Justice has grabbed Don by the balls
Let me know if he serves any prison time. We already learned how Trump skates around financial judgement against him.
Past that, it should be revealing how easy it is to convict these assholes. All 34 counts stuck. Maybe more Presidents should be put on trial, rather than making this particular screwball fascist an exception to the rule.