In 1953, during the McCarthy period, Williams' brother, Albert Rhys Williams, was accused by the House Un-American Activities Committee of having supported the Communist Party from 1919 to 1929. Rev. Williams supported his brother and criticized his attackers. Thirteen members of the congregation accused Williams of being soft on Communism and attempted to have him dismissed from the pulpit. When the issue was put to a congregational vote, the only votes against Williams were the thirteen who had made the accusation, all of whom subsequently left the church. A prominent member of First Unitarian who supported Williams during this controversy was Frank Gannett, founder of the Gannett newspaper chain, who had campaigned for the Republican nomination to run against Franklin Delano Roosevelt in the 1940 presidential elections.