Prime Minister of Australia prime minister, otherwise William McMahon63. Robert Menzies was the oldest person to ever be prime minister, leaving office at 71 years old. The longest-serving Prime Minister was Sir Robert Menzies, who served in office twice: from 26 April 1939 to 28 August 1941, and again from 19 December 1949 to 26 January 1966. In total Robert Menzies spent 18 years, 5 months and 12 days in office. He served under the United Australia Party and the Liberal Party respectively. The shortest-serving Prime Minister was Frank Forde, who was appointed to the position on 6 July 1945 after the death of
Prime Minister of Poland the event that a vote of confidence fails, the process of government formation passes to the Sejm, which will then nominate a prime minister within fourteen days, who will again propose the composition of the cabinet. An absolute majority of votes in the presence of at least half of all Sejm deputies is required to approve the cabinet, which the president will then accept and administer the oath of office. If the vote of confidence fails again, the process of nomination is handed back to the presidency, who will appoint a prime minister, who will then nominate other members of