Final answer:
Federal district courts usually have one judge presiding over cases. There are 94 U.S. District Courts that handle federal cases with witnesses and evidence.
Step-by-step explanation:
Typically, federal district courts are presided over by one judge. There are 94 U.S. District Courts, including those in U.S. territories. Each state has at least one district court, and cases are heard either by a jury or solely by the judge depending on the specifics of the case.
These courts serve as the initial trial courts where federal cases are tried, evidence is presented, and witness testimony is heard. The district courts have significant importance as they manage a wide array of cases, and their decisions can be reviewed by the U.S. courts of appeals, where a panel of three judges presides.
Federal district courts in the United States each have a single judge presiding over them. There are a total of 94 U.S. district courts in the country, covering all 50 states, territories, and special jurisdictions.