Final answer:
The doctrine that allowed states to disregard federal laws is known as nullification, as highlighted in the Virginia and Kentucky Resolutions.
Step-by-step explanation:
The doctrine asserted the right of states to disregard federal actions with which they disagreed is known as nullification. This principle was most notably articulated in the Virginia and Kentucky Resolutions, which suggested that states had the authority to nullify federal laws that they deemed unconstitutional. The debate over the balance of power between federal and state governments has been a central theme in U.S. history, with the Supreme Court often playing a key role in resolving disputes over federalism.