The end of Federalist power refers to the decline and eventual dissolution of the Federalist Party's influence in American politics during the early 19th century. This shift was characterized by the rise of the Democratic-Republican Party, which championed agrarian interests and a more decentralized government, contrasting with the Federalists' support for a strong central authority. Key events, including the War of 1812 and changing public sentiments, marked this transition, leading to the dominance of Jeffersonian ideals and the waning of Federalist ideals.