Frank Hague was an influential and controversial American Democratic Party politician who served as the Mayor of Jersey City, New Jersey from 1917 to 1947. Known as the 'Boss of Jersey City,' he built one of the most powerful political machines in United States history, maintaining absolute control over the city and Hudson County. His long tenure was marked by both significant public works projects and widespread accusations of corruption, voter fraud, and cronyism. Despite the controversies, he remained a major power broker in state and national politics until his retirement.