Dr. Burke, president of the American Historical Reference Society and a consultant for the Smithsonian Institute, counted seven early presidents as cannabis smokers: George Washington, Thomas Jefferson, James Madison, James Monroe, Andrew Jackson, Zachary Taylor and Franklin Pierce. "Early letters from our founding fathers refer to the pleasures of hemp smoking," said Burke. Pierce, Taylor and Jackson, all military men, smoked it with their troops. Cannabis was twice as popular among American soldiers in the Mexican War as in Vietnam: Pierce wrote to his family that it was "about the only good thing" about that war.
Washington & Jefferson were said to exchange smoking blends as personal gifts. Washington reportedly preferred a pipe full of "the leaves of hemp" to alcohol, and wrote in his diaries that he enjoyed the fragrance of hemp flowers. Madison once remarked that hemp gave him insight to create a new and democratic nation. Monroe, creator of the Monroe Doctrine, began smoking it as Ambassador to France and continued to the age of 73.