The Schlieffen Plan called for the Germans to launch an all out attack on France and hope for an early victory. Schlieffen believed that it would take Russia at least 6 weeks to mobilize its military for an attack on Germany.
The constitution explicitly assigns the president the power to sign or veto legislation, command the armed forces, ask for the written opinion of their cabinet, convene or adjourn congress, grant reprieves and pardons, and receive ambassadors.