Which presidential action of George Washington helped establish the principle that federal law is the supreme law of the land?

leading federal troops to put down the Whiskey Rebellion

Explanation:

The concept of federal law as the 'supreme law' views that he federal law should always overruled the state law in case they're contradicting one another.

At that time, the federal government wanted to create a law that increase the tax for whiskey products. The states of Pennsylvania decided to oppose this with their own law because they believe it will hurt their economy. This lead up the the Whiskey Rebellion.

George Washington eventually sent the federal troops to put down the rebellion. It indicates that he believed the federal law should be enacted even  if it's opposing the state law.

a social contract.

"a social contract is an agreement between citizens and their leader where the citizens give up certain freedoms in exchange for protection. the constitution of the united states is an example of a social contract."

it would have concentrated power in the executive branch of the government. it would have restored balance among the three branches of government. it would have set a precedent for government intervention in the economy. it would have signaled an end to all the programs of roosevelt’s new deal.

did this .