I honestly think Trump is circling the drain right now. It's still big, wide circles, and I think he can do more significant damage before he's done, but IMHO the beginning of his end has started.

It’ll be tricky to do since the states don’t pay taxes to the federal government, the people and businesses that reside in the state do.

That will start a civil war and Trump will then assume full control of the country by military force.

If the army supports this then we're all kinds of fucked

Federal taxes don't pass through the state, there is no way they could withhold then. Citizens pay federal taxes directly to the federal government.

If you've gone no contact id be tempted to print out pertinent articles and post them to her.

Varies from State to State. New Hampshire has one of the best IMO

https://www.nh.gov/glance/state-constitution/bill-rights

[Art.] 7. [State Sovereignty.]
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The people of this State have the sole and exclusive right of governing themselves as a free, sovereign, and independent State; and do, and forever hereafter shall, exercise and enjoy every power, jurisdiction, and right, pertaining thereto, which is not, or may not hereafter be, by them expressly delegated to the United States of America in Congress assembled.

The realistic answer is lawsuits. They take a long time and don’t make headlines but there’s probably been more successes than most people realize.

There’s regional health cooperatives, for things like vaccine recommendations now that CDC is mostly conspiracy theory nonsense.

Trump may have withdrawn the us from the Paris Accords, but 24 US states and many cities committed to the climate initiatives. There’s less they can do as Trump rolls back efficiency standards and air pollution regulations but they do have control over local issues like energy portfolio standards, building requirements, insulation and appliance updates, incentives for businesses and homeowners, etc. my state still has some pretty compelling incentives for energy improvements

And sooo much more.

Ironically this is the stuff the Republicans have fetishized for decades

https://www.nh.gov/glance/state-constitution/bill-rights

[Art.] 10. [Right of Revolution.] back to top Government being instituted for the common benefit, protection, and security, of the whole community, and not for the private interest or emolument of any one man, family, or class of men; therefore, whenever the ends of government are perverted, and public liberty manifestly endangered, and all other means of redress are ineffectual, the people may, and of right ought to reform the old, or establish a new government. The doctrine of nonresistance against arbitrary power, and oppression, is absurd, slavish, and destructive of the good and happiness of mankind.

(Emphasis mine)