... the President may, from time to time, when he deems it in the interest of national defense, authorize the Secretary of War...
(1) To manufacture in arsenals, factories, and shipyards ... any defense article for the government of any country
whose defense the President deems vital to the defense of the United States.
Judging from this excerpt, this text came from the
Lend-Lease Act
executive order banning racial discrimination in wartime factories
O
National Labor Relations Act that granted new rights to workers
U. S. declaration of war on Japan