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
Spouse of the Prime Minister of Australia most notably Dame Enid Lyons (1932–39), who had 12 children (one died in infancy). In 1943, four years after her husband's death in office, she was the first woman to be elected to the House of Representatives. She was a junior minister in the Menzies Government from 1949 to 1951. Some Prime Ministers' spouses have received official recognition for their services to the community: Tamie Fraser was the first spouse of a Prime Minister to be provided with an official secretary for dealing with her correspondence. There are currently seven living spouses of former prime ministers of Australia: The most