"It is emphatically the duty of the Judicial Department to say what the law is. Those who apply the rule to particular cases must, of necessity, expound and interpret the rule. If two laws conflict with each other, the Court must decide on the operation of each."

- John Marshall, Chief Justice of the Supreme Court

The authority claimed by John Marshall in this ruling is that the Supreme Court has the right of
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10 points
making laws.
veto any laws of Congress.
issuing writs of mandamus in all cases.
judicial review.

1 answer

The authority claimed by John Marshall in this ruling is that the Supreme Court has the right of judicial review. This means that the Court has the power to interpret the law and determine whether laws are constitutional, effectively allowing it to overturn laws that conflict with the Constitution.