Are you sure about that? I know states are not sovereign but marching troops into them does not sound like a US thing to do, short of martial law.
No, I’m not sure, but national guard from other states have assisted other states during times of emergency. I don’t know what would happen if they decline the assistance. Anyway, the troops aren’t doing any law enforcement, just assistance as outlined in the article.
Kommiefornia needs a repeat lesson of 1864, preferably using Sherman’s methods of redress.
Kennedy did it. So did Eisenhower. And you know about Lincoln. It’s time.
Washington did it. See Whiskey Rebellion.