> At least the fact that he got a state-level conviction means the felony will stick.

That’s far from guaranteed. He has multiple grounds to appeal that conviction both through the New York state courts - and if they don’t overturn it, then the federal courts. If it makes it to SCOTUS, odds are high the conservative majority will be looking for some federal law grounds to overturn it. But it might not ever make it that far. Legal commentators all along have been saying the prosecution’s legal theory is rather novel, and maybe the state appellate courts decide it is a novelty they don’t like. Plus, the way it uses allegations of uncharged federal crimes to upgrade a state misdemeanour to a state felony gives the federal courts an easy way to overturn it, by deciding the state courts have misconstrued the scope of those uncharged federal crimes.