The Radical Republicans were a faction of American politicians within the Republican Party from about 1854 (before the American Civil War) until the end of Reconstruction in 1877. They called themselves "Radicals" and were opposed during the war by the Moderate Republicans (led by Abraham Lincoln), by the Conservative Republicans, and by the pro-slavery Democratic Party. After the war, the Radicals were opposed by self-styled "conservatives" (in the South) and "liberals" (in the North).