We talking about the one that says the President can’t be prosecuted for official acts?

The thing most people miss about that decision is that it’s not a power grant to the Presidency. It’s a power grab by the Supreme Court. They conveniently don’t define what counts as an “official act” that the President can’t be prosecuted for, so that whenever it comes up again, we just end up right back at the Supreme Court for them to decide what’s “official” and what isn’t. And we know their game plan on that kinda thing, from everything else in the past decade, they’ll pull a bunch of old nonsense out of their ass to rule whichever way they please, and then say at the and “this decision is a unique outcome of unique circumstances” or whatever, so they’re free to rule completely differently next time.

The charitable interpretation of the ruling is “the way to get a President to stop doing bad shit is for Congress to impeach them” so in theory, that’s still a check on Presidental power, but we all know how much Congress is loathe to use any amount of power to do anything, what little they haven’t abdicated already.