Deputy Prime Minister of Australia accepted the view put to him by McEwen that to commission a Liberal temporarily as Prime Minister would give that person an unfair advantage in the forthcoming party room ballot for the permanent leader. McEwen's appointment was in keeping with the previous occasion when the main non-Labor party was without a leader; Earle Page of the Country Party was interim Prime Minister between 7 and 26 April 1939—the period between Joseph Lyons' sudden death and the United Australia Party naming Robert Menzies his successor. Since 1968 only two Deputy Prime Ministers have gone on to become Prime Minister: Paul Keating
Office of the Prime Minister (Canada) Progressive Conservative (Tory) Prime Minister Brian Mulroney similarly had a powerful and active PMO, preferring advice he received from his staff than that which came from civil servants (whom he considered to be Liberal-leaning), or from those in the fractious Tory party. After Jean Chrétien was appointed as prime minister, the PMO continued to be the central organ of the government. Chrétien greatly depended upon the PMO, especially his chief of staff, Jean Pelletier, who ran the office from 1993 to 2001, Percy Downe, who served as his director of appointments from 1998 to 2001 and chief of staff from