
The United States Constitution establishes that state courts have the power and duty to enforce federal law unless federal courts have exclusive jurisdiction over a matter. State courts are bound to give effect to federal law and to disregard state law when there is a conflict. In cases where state laws conflict with federal laws, the Supremacy Clause requires state courts to enforce federal law. While state courts may hear cases over which federal courts have jurisdiction, they are not obligated to hear federal claims unless barred by state law. The Supreme Court has upheld state courts' refusal to hear federal claims in certain instances, citing valid excuses under state law.
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What You'll Learn

State courts must honour federal law
State courts are bound to give effect to federal law and must disregard state law when there is a conflict between the two. This is due to the Supremacy Clause of the US Constitution, which dictates that federal law is the "supreme law of the land".
State courts have the power and duty to enforce federal law unless federal courts have been given exclusive jurisdiction. For example, federal law currently grants exclusive jurisdiction to federal courts over bankruptcy cases. However, in the absence of exclusive federal jurisdiction, state courts may hear cases over which federal courts would also have jurisdiction.
State courts are required to hear federal law claims unless state law bars them from doing so through a neutral rule of judicial administration that does not improperly burden claims arising under federal law. The Supreme Court has ruled on this issue in multiple cases, including Howlett v. [name withheld], McKnett v. St. Louis & S.F. Ry., and Herb v. Pitcairn.
In McKnett v. St. Louis & S.F. Ry., the Federal Constitution was interpreted as prohibiting state courts of general jurisdiction from refusing to hear a case solely because it is brought under federal law. Similarly, in Herb v. Pitcairn, a state court's application of state venue laws to dismiss an action brought under federal law was upheld because the cause of action arose outside the court's territorial jurisdiction. In another case, Missouri ex rel. S. R. Co. v. Mayfield, the Supreme Court held that a state's application of the forum non conveniens doctrine to bar a federal claim brought by non-residents was constitutional as long as the policy was enforced impartially.
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Federal courts and state law
The US Constitution establishes a federal system of government, with power shared between the federal government and the state governments. Both federal and state governments have their own court systems.
State courts may hear cases over which federal courts would also have jurisdiction unless federal courts possess exclusive jurisdiction over a matter. For example, federal law grants federal courts exclusive jurisdiction over bankruptcy cases. In some cases, the jurisdiction of state courts will overlap with that of federal courts, and the plaintiff can choose whether to bring the case in state or federal court.
The Supreme Court of the United States is the highest court in the American judicial system and has the power to decide appeals on all cases brought in federal court or state court, as long as they deal with federal law. For example, a First Amendment freedom of speech case decided by a state supreme court could be appealed to the federal Supreme Court. However, if the case were decided based on a similar state law, the Supreme Court of the United States would not be able to consider the case.
In the 2009 case Haywood v. Drown, the Supreme Court considered a state statute that removed jurisdiction over suits seeking money damages from corrections officers from New York state courts. The Court held that the New York law violated the Supremacy Clause, and Justice John Paul Stevens explained that "only a neutral jurisdictional rule will be deemed a 'valid excuse' for departing from the default assumption that state courts will hear federal claims."
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Jurisdiction and state courts
Jurisdiction refers to the power of a court to determine a legal question or issue in controversy. In the United States, both the federal government and each of the state governments have their own court systems. The federal court system has limited jurisdiction, meaning it can only hear cases in special circumstances. These include cases that raise a "federal question" and those involving "diversity of citizenship", which involve the US government, the US Constitution, or other federal laws. Examples include civil cases based on federal laws, such as laws prohibiting employment discrimination, and criminal cases that violate federal law, such as bank robbery or drug cases.
State courts, on the other hand, have general jurisdiction, meaning they can hear any controversy except those prohibited by state law. State court territorial jurisdiction is determined by the Due Process Clause of the Constitution's Fourteenth Amendment. This means that a state court can hear a case involving a defendant from another state as long as it satisfies the constitutional due process requirement for territorial jurisdiction and the state's statutory requirement, often known as the state's long-arm statute.
In certain circumstances, state courts may also have concurrent jurisdiction with federal courts. This means that unless federal courts have exclusive jurisdiction over a matter, state courts may hear cases over which federal courts would also have jurisdiction. For example, in the case of Claflin v. Houseman, the Supreme Court held that "the State courts have concurrent jurisdiction whenever, by their own constitution, they are competent to take it." However, it is important to note that state courts are not always required to hear federal claims, and they may decline jurisdiction in specific situations.
In summary, while federal courts have exclusive jurisdiction over specific matters, state courts possess general jurisdiction and can hear a broader range of cases, including those that involve federal laws or citizens of other states, as long as jurisdictional requirements are met.
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State court advantages
State courts have several advantages over federal courts. Firstly, they handle most disputes that govern people's daily lives, as most laws that affect citizens are passed by state governments. State courts interpret state laws and hear all cases that are not specifically selected for federal courts.
State courts have concurrent jurisdiction and can hear cases over which federal courts have jurisdiction unless federal law exclusively grants jurisdiction to federal courts. For example, federal courts have exclusive jurisdiction over bankruptcy cases. State courts can hear federal law claims unless state law bars them from doing so through a "neutral rule of judicial administration".
State courts handle more cases and interact with the public more than federal courts. They are also courts of "general jurisdiction", meaning they hear all cases that are not specifically selected for federal courts. Disputes between people of different states can be settled in state courts to ensure a fair trial for both parties.
State courts prosecute crimes on behalf of citizens, whereas the US government prosecutes crimes against the federal government. For example, robbery is a state crime, but robbing a mail carrier is a federal crime as it involves a government agency. State courts can also refuse to hear federal claims if state law provides a valid excuse, as in the case of the Rhode Island Supreme Court, which declined to enforce a federal statute containing a punitive damages provision.
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State nullification of federal law
Nullification is a constitutional theory that individual states can invalidate federal laws or judicial decisions they deem unconstitutional. The legitimacy of nullification as a constitutional theory has been rejected, and federal courts have consistently held that states do not have the power to nullify federal laws. The Supremacy Clause of the Constitution establishes that federal law is superior to state law, and Article III grants the federal judiciary the final power to interpret the Constitution.
The theory of nullification was first proposed by Thomas Jefferson and James Madison in the Kentucky and Virginia Resolutions of 1798. In these resolutions, Jefferson and Madison argued that the Constitution was a "compact" among the states, and that each state had the power to "nullify of their own authority" any violation of the Constitution. According to this theory, the states essentially functioned as separate nations before the Constitution was ratified, and the Constitution was a contract by which the states delegated certain powers to the federal government while retaining all other powers for themselves.
There have been several notable attempts at nullification in American history. In 1798, Kentucky attempted to nullify the Alien and Sedition Acts, which had been passed by Congress and signed into law by President John Adams. The Alien Act empowered the president to deport aliens deemed a threat to national security, and the Sedition Act criminalized "false, scandalous and malicious" speech critical of the federal government. In 1832, South Carolina passed an Ordinance of Nullification, declaring two federal tariffs null and void because they disproportionately burdened southern states. More recently, Texas attempted to nullify constitutional rights by banning abortion after six weeks through private lawsuits.
While nullification has been rejected by the federal courts, it continues to be a controversial issue, with supporters arguing that it is a necessary check on federal tyranny. Critics, however, point out that state and local governments could use nullification to uphold discriminatory laws and practices.
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Frequently asked questions
State courts can rule on federal laws, but they are not required to hear federal claims. Unless federal courts have exclusive jurisdiction over a matter, state courts may hear cases over which federal courts would also have jurisdiction.
Yes, federal laws are just as binding on state courts and citizens as state laws are.
The Supremacy Clause states that state courts are bound to give effect to federal law when it is applicable and to disregard state law when there is a conflict.
Yes, state courts can decline jurisdiction over federal claims if state law provides a valid excuse.
Federal habeas review of the claims is barred unless the prisoner can demonstrate cause and actual prejudice as a result of the alleged violation of federal law, or that failure to consider the claims will result in a fundamental miscarriage of justice.










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