Harry Truman actually said...

By virtue of the authority vested in me by the Constitution and statutes, including the Defense Production Act of 1950, and as President of ...

Now, Therefore, I, Harry S. Truman, President of the united States of America, under and by virtue of the authority vested in me by the Cong...

This order shall be effective as of March 4, 1951.

And I will leave it to the gentlemen of the Senate as to whether it is the truth or not.