Was charles sumner the leader of the ku klux klan?

No, Charles Sumner was not the leader of the Ku Klux Klan. He was a prominent abolitionist and a Republican senator from Massachusetts known for his strong advocacy for civil rights and opposition to slavery. The Ku Klux Klan, founded in the aftermath of the Civil War, was a white supremacist organization that sought to maintain white dominance and opposed the rights of African Americans. Sumner's work was in direct contrast to the goals of the Klan.