Patrick Hillery
President Hillery refused to speak to any opposition party politicians, but when Charles Haughey, who was Leader of the Opposition, had rang the President's Office he threatened to end the career of the army officer answered and refused on Hillery's explicit orders to put the call through to the President.  Hillery called the Irish Army's Chief of Staff the following day and as Commander-in-Chief of the Army had ordered the Chief of Staff to make sure that no politician ever interfered with the career of the young army officer.