Nothing will be done about it.
Unless they succeed with their treason.
At that point, their coup will be short lived.
The US government would lose all legitimacy and collapse, the economy would collapse, the rule of law would break down, and it would be a free for all open season CWII bloodbath.
And spare me the constitution and military arguments. At that point, any and all government employee would be considered the enemy. Like I said, when a government loses its legitimacy, they become the tyrants.