Final answer:
Two African Americans, Hiram Revels and Blanche K. Bruce from Mississippi, were elected to the U.S. Senate during Reconstruction.
Step-by-step explanation:
During the Reconstruction era following the Civil War, two African Americans from the South were elected to the U.S. Senate. Both of these men, Hiram Revels and Blanche K. Bruce, represented the state of Mississippi. Hiram Revels was elected in 1870 and was the first African American to sit in the Senate, and Blanche K. Bruce was elected in 1874, becoming the second African American senator. These elections were historic and marked the first time African Americans held such high political office in the United States.