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No, they can render an opinion as to it beng unconstitutional but they have no power to invalidate the law. They must forward it to the Supreme Court for their review and judgement. Only the Supreme Court can nullify the law and invalidate an Act of Congress.
It can invalidate a law if it violates the United States Constitution.
The Supreme Court has the authority to interpret the Constitution.
The United States Supreme Court has the authority to rule a state law is unconstitutional. It has the authority to invalidate legislation and executive actions that the court considers in conflict with the United States Constitution.
It was a concept of judicial review. In other words the supreme court have the authority to review other branches of court and decide whether or not the cases are unconstitutional.
Supreme Court
The power of judicial review.seperation of powers
Both the state and federal supreme courts can overturn unconstitutional state laws; the US Supreme Court is the ultimate authority on the constitutionality of federal law.
The U.S. Supreme Court has the power to declare an act of Congress unconstitutional.
supreme court
(1) declaring invalid laws that violate the U.S. Constitution, (2) asserting the supremacy of federal laws or treaties if they differ from state and local laws, and (3) serving as the final authority on the interpretation of the U.S. Constitution.
"What?" indeed! If the Supreme Court rules it unconstitutional, that ends it. The only ones who can overturn that are some future Supreme Court.