High Quality Content by WIKIPEDIA articles! The Seventy-eighth United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, DC from January 3, 1943 to January 3, 1945, during the last two years of Franklin D. Roosevelt`s presidency. The apportionment of seats in the House of Representatives was based on the Sixteenth Census of the United States in 1940. Both chambers had a Democratic majority.