The official answer would be the United States Constitution.
The Founding Father of the United States wrote the Constitution in 1787. The Constitution is the " supreme law of the land. " The U.S. Constitution has lasted longer than any other country's constitution. It establishes the basic principles of the United States government. The Constitution establishes a system of government called " representatives democracy ."In a representatives democracy, citizens choose representatives to make the laws. U.S. citizens also choose a president to lead the executive branch of government. The Constitution lists fundamental rights for all citizens and other people living in the United States. Laws made in the United States must follow the Constitution.
The Chief Justice is the head of the court.
Article 6 of the US Constitution states the US Constitution is the Supreme Law of Land. It helps unite the US because no State can create legally binding laws that could violate the Constitution. Otherwise, we could have 50 States making their own rules that violate citizens' rights, and chaos would ensue. The US Constitution keeps and safeguards "the union" of the United States.
The Supreme Courts of States, and ultimately, the Supreme Court, is the means to settle disputes over laws, especially the Constitutionality of specific laws.
Article VI of the U.S. Constitution establishes the concept of "supreme law of the land." The Constitution, laws passed by Congress, and treaties of the United States are supreme to state and local laws.
Federal law was needed to be Supreme Law of the Land to ensure that states adhered to the Constitution, despite their local laws.
The Supreme Court has the power to review all laws and treaties of the United States. They can declare these unconstitutional.
States declare laws unconstitutional, not the Supreme Court.
Supreme Court
The Constitution of the United States of America is the Supreme Law of the Land, all subsequent laws must conform to that.
No. Congress (the Senate and House of Representatives) writes laws.
In the United States the US Supreme Court decides if laws meet the requirements of the US Constitution.
They can appeal to the United States Supreme Court to have the law be declared unconstitutional by the Supreme Court's right to judicial review.