Malcolm Turnbull
He lost the leadership positions on 1 December 2009, by one vote to Tony Abbott. Turnbull had agreed to allow the government's emissions trading scheme (ETS) to pass through the parliament. This was opposed by many people in the Liberal Party who argued that an ETS was unnecessary. Other people in the party thought an ETS would harm Australia's coal exports. Others in the party did not like the way that Turnbull managed the arguments within his party.