Franklin Roosevelt actually said...

"By virtue of the authority vested in me by the Constitution and the statutes."

"I hereby order and proclaim the following:"

"The exportation from the United States directly or indirectly to, or on behalf of, or for the account of any person, so long as his name appears on such list, of any article or material... is hereby p..."

"Any person, so long as his name appears in such list, shall be deemed to be a national of a foreign country."