United States Attorney in the context of "Billions (TV series)"

John Parker Hale (March 31, 1806 – November 19, 1873) was an American politician and lawyer from New Hampshire. He served in the United States House of Representatives from 1843 to 1845 and in the United States Senate from 1847 to 1853 and again from 1855 to 1865. He began his congressional career as a Democrat, but helped establish the anti-slavery Free Soil Party and eventually joined the Republican Party.

Born in Rochester, New Hampshire, Hale established a legal practice in Dover, New Hampshire after graduating from Bowdoin College. Hale won election to the New Hampshire House of Representatives in 1832 and served as the United States Attorney for New Hampshire under President Andrew Jackson and President Martin Van Buren. He won election to the United States House of Representatives in 1842 but was denied the party's nomination in 1844 due to his opposition to the annexation of Texas. After losing his seat, he continued to campaign against slavery and won election to the Senate in 1846 as an Independent Democrat. In the Senate, he strongly opposed the Mexican–American War and continued to speak against slavery.

William Wirt (November 8, 1772 – February 18, 1834) was an American lawyer, politician and author who is credited with turning the position of United States Attorney General into one of influence. The longest-serving attorney general in U.S. history, Wirt also served in the Virginia House of Delegates and was the Anti-Masonic nominee for president in the 1832 election.

Orphaned as a child, Wirt grew up in Maryland but initially pursued a legal career in Virginia, passing the Virginia bar in 1792. After holding various positions, he served as the prosecutor in Aaron Burr's trial for treason. Wirt won election to the Virginia House of Delegates in 1808 and was appointed as a United States Attorney in 1816. The following year, President James Monroe appointed him to the position of United States Attorney General. Wirt remained in that office for the next twelve years, serving under Monroe and John Quincy Adams. He continued his law career after leaving office, primarily in Maryland, and may be best known for representing the Cherokee in Cherokee Nation v. Georgia.

Arthur Simon Flegenheimer (August 6, 1901 – October 24, 1935), known as Dutch Schultz, was an American mobster based in New York City in the 1920s and 1930s. He made his fortune in organized crime-related activities, including bootlegging and the numbers racket. Schultz's rackets were weakened by two tax evasion trials led by United States Attorney Thomas Dewey, and also threatened by fellow mobster Lucky Luciano.

Schultz asked the Commission, the governing body of the American Mafia, for permission to kill Dewey, in an attempt to avert his conviction. They refused. When Schultz disobeyed them and made an attempt to kill Dewey, the Commission ordered his murder in 1935. Schultz was shot at a restaurant in Newark, New Jersey, and died the next day.

Henry Lewis Stimson (September 21, 1867 – October 20, 1950) was an American statesman, lawyer, and politician. Over his long career, he emerged as a leading figure in U.S. foreign policy by serving in both Republican and Democratic administrations. He served as Secretary of War (1911–1913) under President William Howard Taft, Secretary of State (1929–1933) under President Herbert Hoover, and again Secretary of War (1940–1945) under Presidents Franklin D. Roosevelt and Harry S. Truman, overseeing American military efforts during World War II.

The son of the surgeon Lewis Atterbury Stimson and Candace C. Stimson (née Wheeler, daughter of Candace Thurber Wheeler) Stimson became a Wall Street lawyer after graduating from Harvard Law School. He served as a United States Attorney under President Theodore Roosevelt and prosecuted several antitrust cases. After he was defeated in the 1910 New York gubernatorial election, Stimson served as Secretary of War under Taft. He continued the reorganization of the United States Army that had begun under his mentor, Elihu Root. After the outbreak of World War I, Stimson became part of the Preparedness Movement. He served as an artillery officer in France after the United States entered the war. From 1927 to 1929, he served as Governor-General of the Philippines under President Calvin Coolidge.

George Mifflin Dallas (July 10, 1792 – December 31, 1864) was an American politician and diplomat who served as the 11th vice president of the United States from 1845 to 1849. He also served as the mayor of Philadelphia from 1828 to 1829, and as the U.S. Minister to the United Kingdom from 1856 to 1861. Dallas is possibly the namesake of Dallas, Texas.

Born in Philadelphia, Dallas was a son of U.S. Treasury Secretary Alexander J. Dallas, and studied law in his father's office and was admitted to the bar in 1813. He served as the private secretary to Albert Gallatin and worked for the Treasury Department and the Second Bank of the United States. He emerged as a leader of the Family Party faction of the Pennsylvania Democratic Party. Dallas developed a rivalry with James Buchanan, the leader of the Amalgamator faction. Between 1828 and 1835, he served as the mayor of Philadelphia, U.S. attorney for the U.S. District Court of Pennsylvania and as Pennsylvania's attorney general. He also represented Pennsylvania in the United States Senate from 1831 to 1833 but declined to seek re-election. President Martin Van Buren appointed Dallas to the post of Minister to Russia, and Dallas held that position from 1837 to 1839.

In the U.S. federal judicial system, the United States is divided into 94 judicial districts. Each state has at least one judicial district, as do the District of Columbia and Puerto Rico.

Each judicial district contains a United States district court with a bankruptcy court under its authority. There is also a United States Attorney in each district, who acts as the federal government's lawyer in the district, both prosecuting federal criminal cases and defending the government (and its employees) in civil suits against them; the U.S. Attorney is not employed by the judicial branch but by the Department of Justice, part of the executive branch. There is also a Federal Public Defender who represents people charged with federal crimes who cannot afford to hire their own lawyers; some FPDs cover more than one judicial district. Each district also has a United States Marshal who serves the court system.