When the Supreme Court is the first court to hear a case (which is very rare) it is said to have "original jurisdiction."
What I think you meant was, when the Supreme Court considers an issue it has not thought about before, it is called "a matter of first impression."
original jurisdiction
That would be the U. S. District court.
the trial court
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Centarori
The Supreme Court hears cases which are on final appeal. The Supreme Court also hears cases relating to national elections.
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Supreme Court of the United States
The Supreme Court hears the most important cases.
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supreme court
The Supreme Court is the highest court in the government. It interprets the constitution concerning issues that is hears.
This time is called the sitting
The United States district courts hears cases involving two states. The last court to hear the case would be the Supreme Court.
(in the US) There is no such distinction. There are only STATE Supreme Courts (one per state) and the U.S. Supreme Court. EXCEPT in New York State, where each county outside of New York City has both a County Court and a Supreme Court (and also a Family Court and a Surrogate's Court). In most counties, the Supreme Court hears civil cases and the County Court hears civil cases, but this can vary a bit by county. See the related links for more info. While in most states the state Supreme Court is the highest state court and hears appeals from lower courts such as County Courts, the highest state court in New York is called the Court of Appeals.