Wisconsin circuit courts
In addition, the courts are constrained from taking action that will encroach on the powers of the legislative or executive branches. Under the separation of powers doctrine, no branch of government may exercise a power of government assigned exclusively to another branch. The purpose of separating powers among the branches of government is to avoid concentration of governmental power in the hands of a new and to give the various branches the ability to check actions by the other branches.
Federal government of the United States
The district courts are the trial courts wherein cases that are considered under the Judicial Code (Title 28, United States Code) consistent with the jurisdictional precepts of "federal question jurisdiction" and "diversity jurisdiction" and "pendent jurisdiction" can be filed and decided. The district courts can also hear cases under "removal jurisdiction", wherein a case brought in State court meets the requirements for diversity jurisdiction, and one party litigant chooses to "remove" the case from state court to federal court.