Marshall believed the Judicial Branch should be co-equal to the other branches of government, and should be the final authority on constitutional interpretation. He knew Congress couldn't be counted on to evaluate the constitutionality of their own laws because of the built-in conflict-of-interest, and believed this was the proper job of the judiciary.
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Greater power for the federal government
Supreme Court to declare acts of Congress and state laws unconstitutional
John Marshall is considered to have been a loose constructionist, rather than a strict constructionist. Marshall was the 4th Chief Justice of the Supreme Court.
Gibbons v. Ogden was the landmark decision which Supreme Court held that the power to regulate interstate commerce was actually granted to the Congress by Commerce Clause in Article I of the Constitution.
John Marshall served as the 4th Chief Justice of the U.S. from 1801 to his death in 1835. Marshall also served as the Secretary of State under President John Adams. He was also a Federalist (Hamilton's Party) from Virginia. Marshall is credited with authoring many landmark Supreme Court decisions that strengthened the power of the Judicial Branch and the Federal government as a whole. He is arguably considered the most influential Supreme Court justice in history.