I think you mean "where" not "why". From the 3rd Article of the Constitution. The Constitution only establishes the U.S. Supreme Court, but it gives the Congress the power to establish lessor federal courts. TheJudiciary Act of 1789 setup the lessor courts and has been amended many times since 1789.
Congress has the power to create new federal courts.
The power to create federal courts below the Supreme Court lies with Congress, as outlined in Article III of the U.S. Constitution. Congress has the authority to establish lower federal courts and determine their jurisdiction and structure. This includes the creation of district courts and appellate courts, which serve to handle cases that fall under federal jurisdiction.
The authority to set up a system of federal courts was granted to Congress by the U.S. Constitution. Article III of the Constitution establishes the judicial branch and allows Congress to create inferior courts under the Supreme Court. This provision enables Congress to determine the structure and jurisdiction of the federal court system.
Congress
Constitutional Courts - mandated by the constitution Legislative Courts
They created it in 2010
The Constitution gives Congress the judicial powers to create all of the federal courts below the Supreme Court and to structure the federal judiciary. Congress also has the power to define federal crimes and set punishment for violators of federal law.
Congress has the power to create lower federal courts, therefore the Legislative branch has the power to create these courts.
Congress is vested with the authority to create courts "inferior" to the US Supreme Court in both Article I and Article III of the US Constitution.
The U.S. Constitution establishes two primary types of courts: the Supreme Court and inferior courts. The Supreme Court is the highest court in the land, while Congress has the authority to create lower federal courts, known as inferior courts, to address various legal matters. These courts are part of the federal judiciary system, which interprets and applies federal law.
They have the power to create new federal courts.
Congress has the power to create new federal courts