In August 2018, Peter Dutton challenged Turnbull for the leadership of the Liberal Party, due to dissatisfaction from the party's conservative wing. Turnbull defeated Dutton in a leadership ballot, but tensions continued to mount and the party voted in favour of holding a second spill; Bishop chose to be a candidate. In the second vote, Bishop was eliminated in the first round by Peter Dutton and Scott Morrison, with Morrison elected as party leader (and thus prime minister) in the second round. She declined to retain the foreign affairs portfolio in the Morrison Ministry, instead moving to the backbench. Bishop retired from politics on 11 April 2019, before the impending federal election.