This Constitution, and the Laws of the United States which shall be made in Pursuance thereof; and all Treaties made, or which shall be made, under the Authority of the United States, shall be the supreme Law of the Land; and the Judges in every State shall be bound thereby, any Thing in the Constitution or Laws of any state to the Contrary notwithstanding.
If it isn't an enumerated power under Art 1 Sec 8, then nothing Congress passes can make it legit. No, not even a SCOTUS ruling. Sorry, it just doesn't work that way. Not on paper at least.
We haven't stretched enough necks to make them follow it. So now they just figure they can ignore the limits.
They are in for a very rude awakening.
The federal judiciary interprets the meaning of the Constitution, and when that reaches the SCOTUS, the decisions are final. SCOTUS decisions, in short, have all the same power as Constitutional text. That IS how it was written, sadly.