The day after the attack, President Franklin D. Roosevelt addressed a joint session of United States Congress. Roosevelt called December 7 "a date which will live in infamy". Congress declared war on the Empire of Japan amid outrage at the attack and the late delivery of the note from the Japanese government breaking off relations with the U.S. government, actions considered treacherous. Pacifist Representative Jeannette Rankin, a Republican from Montana, cast the only dissenting vote. Roosevelt signed the declaration of war later the same day. Continuing to intensify its military mobilization, the U.S. government finished converting to a war economy, a process begun by provision of weapons and supplies to the Soviet Union and Great Britain.