Antietam.
This question has been tried and settled in American blood. The answer is no.
The Declaration of Independence is still the founding document of our country and the principles enshrined in that document are still valid.
The Federal Government is 1000 times more tyrannical now than the British Government was under George III.
The states may not merely have a right to secede, but it may be a duty.
I thougth they said that was about slavery.
I seem to remember more than a few other such american war about secession:
They were known as the American revolution, and the Texas Revolution.
If secession is not an inalienable right of men when the terms of their existing union is violated by a hospital or apathetic ruling majority or oligarchy. Then Washington shouldn’t exist at all.