William Franklin Knox (January 1, 1874 – April 28, 1944) was an American politician, newspaper editor and publisher. He was also the Republican vice presidential candidate in 1936, and Secretary of the Navy under Franklin D. Roosevelt during most of World War II. On December 7, 1941, Knox flanked by his assistant John O’Keefe walked into Roosevelt's White House study at approximately 1:30 p.m. EST announcing that Japan had attacked Pearl Harbor.