Political machines are organized groups that control political parties in a specific area, often using patronage and favoritism to maintain power. They typically operate at the local level, providing services and support to constituents in exchange for votes. This system can lead to corruption, as leaders may prioritize their interests over the public good. These machines often rely on a network of loyal supporters, known as party loyalists, who help mobilize voters and secure election victories. Notable examples include the Tammany Hall in New York City, which was influential in the late 19th and early 20th centuries, shaping local politics through a combination of social services and political influence.