Richard Nixon actually said...
Now, Therefore, I, Richard Nixon, President of the United States of America, do call upon the people of the United States, and upon all patriotic, civic, and educational organizations, to observe Thursday, May 1, 1969, as Loyalty Day, with appropriate ceremonies in which all of us may join in a reaffirmation of our loyalty to the United States of America.
Context
Proclamation 3904—Loyalty Day, 1969
03/25/1969