What head of state position was held by Harry S Truman when he gave Harold E Wilson the Medal of Honor?
Harold E. Wilson:  He received the award from President Harry S. Truman during ceremonies at the White House on April 11, 1952. President of the United States: The President of the United States (informally referred to as "POTUS") is the head of state and head of government of the United States.
President of the United States