During this period Sherwood also served as a speechwriter for President Franklin D. Roosevelt. He recounted the experience in his book "Roosevelt and Hopkins: An Intimate History", which won the 1949 Pulitzer Prize for Biography or Autobiography and a 1949 Bancroft Prize. Sherwood is credited with originating the phrase that eventually evolved to "arsenal of democracy", a frequent catchphrase in Roosevelt's wartime speeches. Sherwood was quoted on May 12, 1940 by "The New York Times"" "This country is already, in effect, an arsenal for the democratic Allies."