The three powers given to the federal government are legislative, executive and judicial. The legislative branch, which comprises the Senate and the House of Representatives, hold the legislative powers. Together, the Senate and House of Representatives are called the United Stated Congress.
Congress has the power to declare war and make laws, among other authorities. The president, together with specific agencies and departments, holds executive power. The White House and Federal Agencies are part of the executive branch. The Supreme Court, the court support organizations, the Special Courts and the Lower Courts hold the judicial powers. Examples of the Lower Courts are U.S. Court of Appeals and U.S. Bankruptcy Courts. The U.S. Tax Court and U.S. Court of Federal Claims are examples of the Special Courts.