Harry Truman actually said...
Now, Therefore, I, Harry S. Truman, President of the United States of America, acting under and by virtue of the authority vested in me by the Constitution of the United States and the aforesaid sections of the Revised Statutes of the United States, do hereby prescribe and proclaim the following regulations, additional and supplemental to all other regulations affecting the restraint and removal of alien enemies:
04/09/1946