A more thorough explanation:

Definition: Nullification is the act of making something void. Specifically, it refers to a state's action of canceling a federal law based on the idea that the state has the power to do so.

Example: In the 1800s, some southern states tried to nullify federal laws that they believed were harmful to their economy and way of life. For example, South Carolina tried to nullify a federal tariff law that they believed unfairly taxed their goods. This led to a constitutional crisis and ultimately contributed to the start of the Civil War.

Jury Nullification: Jury nullification is when a jury intentionally ignores the evidence or refuses to apply the law because they believe that the result would be unjust or unfair. For example, a jury might nullify a drug possession charge if they believe that the law is too harsh and that the defendant does not deserve to be punished severely.

Example: In 1992, a jury in California nullified a case against a man who grew marijuana for medical purposes. The jury believed that the man was not a criminal and that the law was unjust. This case helped to pave the way for the legalization of medical marijuana in California and other states.

Overall, nullification is a controversial concept that raises questions about the balance of power between the federal government and the states, as well as the role of juries in the legal system.