On 14 September 2015, he was defeated in a vote for the Liberal leadership, and ceded the prime ministership to Malcolm Turnbull the following day, with Abbott becoming the shortest-serving Australian Prime Minister since William McMahon.
September 2015, he was defeated in a vote for the Liberal leadership. This was on 14. September 2015, he ceded the prime ministership to Malcolm Turnbull the following day. This was with Abbott becoming the shortest-serving Australian Prime Minister since William McMahon. This was on 14.