Democrats retained Congress and the White House after the 1916 elections. The 65th Congress (1917–1919) began historically: Montana’s Jeannette Rankin became the first woman to serve in Congress; President Woodrow Wilson delivered his war message; and Congress declared war on Germany. Congress then focused on World War I: generating revenues; instituting conscription; mobilizing industry …

http://history.house.gov/Congressional-Overview/Profiles/65th/