In 1966, along with three Republican Senators and four other Republican Representatives, Tupper signed a telegram sent to Georgia Governor Carl E. Sanders regarding the Georgia legislature's refusal to seat the recently elected Julian Bond in the Georgia House of Representatives. This refusal, said the telegram, was "a dangerous attack on representative government. None of us agree with Mr. Bond's views on the Vietnam War; in fact we strongly repudiate these views. But unless otherwise determined by a court of law, which the Georgia Legislature is not, he is entitled to express them."