Barron v. Baltimore is a landmark Supreme Court case from 1833 that established the principle that the Bill of Rights did not apply to state governments. In this case, John Barron sued the city of Baltimore for damages after the cityโs actions resulted in the loss of his wharf's profitability. The Court ruled that the Fifth Amendment's guarantee of just compensation for property taken by the government was not applicable to state actions, thereby solidifying the concept of dual citizenship under federal and state law.