Federal law refers to the body of laws created by the national government of a country. In the United States, federal laws are established by the U.S. Congress and apply to all states. These laws cover a wide range of issues, including immigration, taxation, and civil rights, ensuring a uniform legal framework across the nation. Federal laws are enforced by various agencies, such as the Federal Bureau of Investigation (FBI) and the Department of Justice. When conflicts arise between state and federal laws, federal law generally takes precedence, as established by the Supremacy Clause in the U.S. Constitution.