Why Is Barron V. Baltimore Important

Why is Barron v. Baltimore important?

A) The justices sided with the national government over state governments, giving added power to the supremacy clause.
B) The justices ruled that Congress did not have the authority to prohibit slavery in any state.
C) The justices ruled that the Missouri Compromise was unconstitutional.
D) The justices helped to establish dual federalism as a guiding judicial principle to settle questions concerning state and national power.