In September 2016, Nalder resigned from the ministry, stating he no longer supported Colin Barnett as leader of the Liberal PartyBrendan Foster, "Liberal party in tatters with Dean Nalder quitting Cabinet", WAtoday, 17 September 2016. Retrieved 17 September 2016. Days after his resignation, Nalder announced that he would stand for the Liberal Party leadership if a spill motion was successful. At a party-room meeting, the spill motion was moved by one of his supporters, Murray Cowper, but was defeated 31–15, and Nalder subsequently said that he had "no further interest in any challenge"."Dean Nalder congratulates 'captain' Colin Barnett, says he won't challenge again", WAtoday, 20 September 2016. Retrieved 20 September 2016.
