Who led the Radical Republicans during the 1800s.?

The Radical Republicans were primarily led by Thaddeus Stevens and Charles Sumner during the 1800s. Stevens, a congressman from Pennsylvania, was a key figure in advocating for civil rights and the impeachment of President Andrew Johnson. Sumner, a senator from Massachusetts, was known for his strong opposition to slavery and his efforts to secure equal rights for freedmen during Reconstruction. Together, they played pivotal roles in shaping the Radical Republican agenda aimed at transforming Southern society after the Civil War.