The concept of judicial review—the ability of federal courts to declare legislative or executive actions unconstitutional—was developed as a result of the U.S. Supreme Court's Marbury v. Madison judgment (1803).
Right, there are seven justices on the Supreme Court:
The Chief Justice and eight Associate Justices are among the Supreme Court's current nine justices. The Court has had 104 Associate Justices throughout its history, with The Honorable John G. Roberts, Jr. serving as its 17th Chief Justice.
How many judges sit on the Supreme Court?
Even the number of justices on the Supreme Court can be decided by Congress; the current court's nine members—one Chief Justice and eight Associate Judges—have only been since 1869, but there have periodically been as few as six justices.
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