Harry Truman actually said...
Now, Therefore, I, Harry S. Truman, President of the United States of America, by virtue of the authority vested in me by the above-quoted statutory provisions, do hereby declare and proclaim that the foreign discriminating duties of tonnage and imposts within the United States are suspended and discontinued so far as respects the vessels of the Union of South Africa and the produce, manufacturers, or merchandise imported in said vessels into the United States from the Union of South Africa or from any other foreign country; the suspension to take effect from April 19, 1949, and to continue so long as the reciprocal exemption of vessels belonging to citizens of the United States and their cargoes shall be continued, and no longer.
05/18/1949