Her refusal is irrelevant. Dukakis, when he was govenor of Mass refused to allow the Mass NG to deploy to central America. USSC ruled, that the federal government exercises plenary power over the National Guard. Plenary means unlimited. Dukakis lost. Also worth of note, if the federal government exercises plenary power over the NG, then the NG cannot be the independent militia envision by the Founding Fathers.
Actually, it was Gov. Rudy Perpich of Minnesota who refused, and was batted down (unanimously, btw) by the Supreme Court. Once the President nationalizes a state’s NG (or any part of it), the Governor of that state becomes as powerful in guiding the nationalized units as some beggar in the streets.
The Perpich decision was important for another reason besides asserting the absolute primacy of the President over a state government in these circumstances: by showing that the NG could be federalized with the stroke of a Presidential pen, it gave lie to the assertion by gun control/gun confiscation advocates that the National Guard of each state is that state’s militia - it is manifestly NOT, it is a federal unit that is based in, and peopled by citizens of, that particular state...but that is all.
A good point. A damn good point!