Still, backed by pretty solid statutory authority[0] (one created by Democrats and signed into law by Carter, in point of fact). Congress wanted the President to have this power.
I'll get scorched for this, but: I never once read a word of complaint about separation-of-powers, when Biden was sanctioning objects left and right for his own, self-declared, national-security emergencies. I don't recall reading once, i.e. at the time of the sweeping China or GPU sanctions, a peep of protest along the lines of, "This should *not* be something a President should be able to do unilaterally! That's far too much discretionary power in the hands of one person! Congress should have to debate it". We didn't invent an imperial presidency in 2025; it's the agglomeration of decades of civic apathy.
[0] https://en.wikipedia.org/wiki/International_Emergency_Econom... ("International Emergency Economic Powers Act"; C-f "14203" for the current topic)