What was the basis of Justice John Marshall's assertion that the federal courts have the power of judicial review?

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Justice John Marshall believed that it was the duty of the courts to say what the law is and to interpret and expound upon the law. He argued that in order to fulfill this duty, the courts must have the power of judicial review, which allows them to strike down laws and actions that are deemed unconstitutional. This power is not explicitly granted in the Constitution, but Marshall believed that it was implied in the structure and purpose of the judicial branch.

What Was the Basis of Justice John Marshall's Assertion That