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The tenth amendment states that the powers not delegated to the United States by the Constitution, nor prohibit it by the states, are reserved to the state, or the people.
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The government of Maryland imposed a tax on the Second Bank's Baltimore branch. The branch's chasier, James William McCullough, refused to pay the tax. When Maryland took McCullough to its state court, the state of Maryland won.
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When Congress passed a tariff, South Carolina unsuccessfully attempted to nullify the tariff, claiming that in causes of conflict between a state and the national government, the state should have the ultimate authority over its citizens.
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Establishment of the Port Authority of New York and New Jersey by an interstate compact between the two states.
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The regulation of the production of crude oil and natural gas.
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President Dwight D. Eisenhower federalizes the National Guard to enforce the court-ordered desegregation of Little Rock High School.
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The Supreme Court held that Congress had exceeded its Constitutional authority under the commerce clause when it passed the Gun Free Zones Act in 1990.
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The Supreme court makes a 5-4 decision to legalize same-sex marriage in all 50 states and refuses to hear cases of states wanting to ban the law in their state.
