The landmark decision in Marbury v. Madison expanded the power of the judicial branch by claiming the right to…

Power of judicial review.

Explanation:

The landmark decision in Marbury v. Madison expanded the power of the judicial branch by claiming the right to "power of judicial review."

This is because, in the case of Marbury v Madison in 1803, the United States Supreme Court under the Chief Justice John Marshall declared the Congress decision as unconstitutional, thereby expanded the power of the judicial branch by claiming the right to the power of judicial review

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