From a Washington Post column by Ruth Marcus headlined “New York’s Stormy Daniels case against Trump is much thornier than it looks”:

If you hope that Donald Trump will face criminal charges for at least some of his misdeeds, there is a prospect worse than the possibility that the former president won’t be indicted. It is that he will be charged and escape punishment anyway.

When you strike at a king, you must kill him, the saying goes, and it applies with force in the case of Trump, who would inevitably use the mere fact of indictment as evidence of a supposed liberal plot against him, and then deploy an acquittal (or dismissal of any charges) as convincing proof of the conspiracy.