The Ontario New Democratic Party elects its leaders by secret ballot of the party members and/or their delegates at leadership elections, as did its predecessor, the Co-operative Commonwealth Federation (Ontario Section). The party leader can be challenged for the leadership at the party's biennial convention. The Ontario New Democratic Party is a social democratic political party in Ontario, Canada.
From 1934 until 1942, the president of the Ontario CCF acted as the party's spokesperson and leader during election campaigns. John Mitchell, a Hamilton alderman, was CCF president from 1934 until 1941. Samuel Lawrence, former Ontario CCF MPP for Hamilton East was elected party president in 1941 and recommended that the party elect a leader in 1942.[1][2]