Answer:
Blanche K. Bruce was the first African American senator to complete a full term.
Step-by-step explanation:
Blanche Kelso Bruce was an American politician from the Republican Party. He was the first African American that completed a full term in the US Senate.
In 1874 when he was elected to the US Senate by the Mississippi Legislature. After six years in Washington, he was replaced by Democrat James Z. George; The Democratic Party had won the majority in the Mississippi Legislature in the meantime, so that a re-election for Bruce was not possible.