WRONG!
Your source (the U.S. Senate web page) reflects liberal thinking. Google won’t help you. Like I said, it’s not even who you think it is when I tell you it’s not who you think it is.
I promise everyone: you will not disagree with me when I tell you the answer. But it is not Hiram Revels.
I noticed you said “Name the first African-American senator.”
You didn’t say “black”.