A presidential proclamation is a statement issued by a president on a matter of public policy issued under specific authority granted to the president by Congress and typically on a matter of widespread interest. An administrative order (i.e., findings, letters, orders) can be issued. A presidential notice or a presidential sequestration order can also be issued. The newest executive power, national security presidential memoranda, operate like executive orders, but are only in the area of national security. They date back to President Harry S. Truman and have been called many different names.