The conflict between states' rights and federal authority during John Adams's presidency primarily manifested as outlined in:
B. Some states claimed the Alien and Sedition Acts violated the Constitution and refused to enforce them.
The Alien and Sedition Acts, passed in 1798, were highly controversial and faced significant opposition, particularly from states like Virginia and Kentucky, where state legislatures passed resolutions asserting that these acts were unconstitutional and an overreach of federal authority. This response was part of a broader debate over the balance of power between the federal government and the states, highlighting the tensions inherent in the relationship between state sovereignty and federal authority during that period.