Complex sentence: He became the first leader of the Ontario CCF in 1942 and took it to within five seats of victory with 34 seats and 32% of the vote in the election of 1943 that elected a Conservative minority government under George Drew.
Split into simpler sentences: He became the first leader of the Ontario CCF in 1942. The following year, he lead the party to within five seats of victory with 34 seats and 32% of the vote in the election of 1943 that elected a Conservative minority government under George Drew.