The election of 1800 led to Thomas Jefferson's presidency, marking a significant shift in the federal government's power dynamics. Jefferson's informal style and emphasis on Republican values contrasted with his predecessors, particularly John Adams, who strengthened the Federalist control over the judiciary. The Marbury v. Madison case, decided by Chief Justice John Marshall, established the doctrine of judicial review, giving the Supreme Court the power to declare acts of Congress unconstitutional, and had a lasting impact on American politics and the Constitution.
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