 However, Diefenbaker proved a gadfly and an annoyance to Mackenzie King.Angered by the words of Diefenbaker and fellow Conservative MP Howard Green in seeking to censure the government, the Prime Minister referred to Conservative MPs as "a mob".When Diefenbaker accompanied two other Conservative leaders to a briefing by Mackenzie King on the war, the Prime Minister exploded at Diefenbaker (a constituent of his), "What business do you have to be here?