Charles Sumner: Biography, Achievements & Lasting Legacy

Sumner began his political activism as a member of various anti-slavery groups, leading to his election to the U.S. Senate in 1851 as a member of the Free Soil Party; he soon became a founding member of the Republican Party. In the Senate, he devoted his efforts to opposing the "Slave Power," which in 1856 culminated in a vicious beating, almost to death, by Representative Preston Brooks on the Senate floor. Sumner's severe injuries and extended absence from the Senate made him a symbol of the anti-slavery cause. Though he did not return to the Senate until 1859, Massachusetts reelected him in 1857, leaving his empty desk as a reminder of the incident, which polarized the nation as the Civil War approached.

During the war, Sumner led the Radical Republican faction, which believed President Abraham Lincoln was too moderate toward the South. As chair of the Foreign Relations Committee, Sumner worked to ensure that the United Kingdom and France did not intervene on behalf of the Confederate States. After the Union won the war and Lincoln was assassinated, Sumner and Thaddeus Stevens led congressional efforts to grant equal civil and voting rights to freedmen and to block ex-Confederates from power so they would not reverse the gains derived from the Union's victory in the war. President Andrew Johnson's persistent opposition to these efforts played a role in his impeachment in 1868.

During the Grant administration, Sumner fell out of favor with his party. He supported the annexation of Alaska but opposed Grant's proposal to annex Santo Domingo. After leading senators to defeat the Santo Domingo Treaty in 1870, Sumner denounced Grant in terms that made reconciliation impossible, and Senate Republicans stripped Sumner of his power. Sumner opposed Grant's 1872 reelection and supported Liberal Republican Horace Greeley. Sumner died in office less than two years later.