Constables in the United States
While Constables primarily serve the Courts, they belong to the executive branch of government.
Emergency Price Control Act of 1942
Federal Courts is the study of the relationship between state courts, federal courts, and the other branches of government. The Emergency Price Control Act and the associated Emergency Court of Appeals raised several questions about the relationship between Congress and the Federal Judiciary: (1) Can Congress "carve up" federal jurisdiction in this way? (2) If yes, is the creation of the Emergency Court--with all its limits--constitutional? To both questions, the Supreme Court answered yes, though its understanding of the relationship between the legislative and judicial branches may have been informed by the exigencies of war.