Benjamin Harrison actually said...
The United States Government engages in return that the President of the United States shall, in pursuance of section 13 of the act of Congress of March 3, 1891, issue the proclamation therein provided for in regard to the extension of the provisions of that act to German subjects as soon as the Secretary of State shall have been officially notified that the present agreement has received the necessary legislative sanction in the German Empire.
04/15/1892