The states countervailing the Constitutional requirement for an Electoral College are entering into a “compact”, which is prohibited by the US Constitution.
Article 1, Section 10, US Constitution
“No State shall, without the Consent of Congress, lay any
Duty of Tonnage, keep Troops, or Ships of War in time of
Peace, enter into any Agreement or Compact with another
State, or with a foreign Power, or engage in War, unless
actually invaded, or in such imminent Danger as will not
admit of delay.”
The crux of the issue today. NPV is perfectly fine and will remain fine until it is challenged and dealt with. I wonder if that means it will continue to weave its way into the national discourse until some harm occurs, and only then, after it hurts a state or party, gets challenged and overturned (by courts or by the same states that entered into this illegal compact).