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Not only are jury rights extensively protected in the United States Constitution, but jurors exercising their right of jury nullification have also been instrumental in passage of at least three amendments to the Constitution. Jury nullification cases laid a foundation for at least four of the five freedoms listed in the First Amendment as well as contributed to passage of the Thirteenth (Emancipation) and Twenty-First (Repeal of Federal Prohibition) Amendments.
Check out these videos where I talk about some of these cases: