One significant U.S. Senator in Black history is Hiram Rhodes Revels. He was the first African American to serve in the U.S. Senate. Revels was born free in North Carolina in 1827 and became a minister and educator. He later moved to Mississippi and became involved in Republican Party politics during the Reconstruction era.

In 1870, Revels was appointed by the Mississippi state legislature to fill the vacant seat in the U.S. Senate previously held by Jefferson Davis, who had become the President of the Confederacy. Revels served in the Senate for about a year and advocated for civil rights and equality for African Americans.

Revels' historic tenure in the Senate was a significant milestone in the history of Black political representation and civil rights in the United States. His legacy paved the way for future generations of African Americans to enter the political arena and fight for equality and justice.