This court order to turn over Ukraine materials in 30 days will probably be appealed by Trump which means it will likely land in the SCOTUS.
If SCOTUS rules in favor of Trump, saying he has no need to turn over materials, I cannot think of a larger constitutional crisis.
It would be about as close to any definition of "an end to democracy" AND even to "the rule of law" as I can think of, because it effectively DOES put President Trump ABOVE the LAW.
And if a majority of Americans and our lawmakers simply acquiesce to such a travesty, then we'd better damn well learn to love our yokes and the whip, which is sure to come.
Congress wanted the materials, Trump told them to go to Hell.
Now the courts have weighed in, Trump appeals, it goes to SCOTUS.
If SCOTUS favors Trump then Congress and the Judiciary are effectively stripped of all power and are rendered entirely irrelevant.
That's the end of our democratic republic. We will be finished.