Edward William Brooke III was an American Republican politician. In 1966, he became the first African American popularly elected to the United States Senate. He represented Massachusetts in the Senate from 1967 to 1979. source
I think Donald Trump's interpretation of marriage is something that he himself doesn't really believe in. 'Traditional marriage' is where two people love each other, commit to each other, care for each other over the years. It is a meaningful ceremony, and his interpretation of that is not recognizing what real marriage is.