The Alberta wing of the Labour Party federated with the CCF in 1935, but ran its own candidates in the 1935 and 1940 provincial elections. In 1942, the Alberta CCF clubs formally merged with the Labour Party and Elmer Roper became the new leader after achieving an unexpected victory in a 1942 by-election, becoming the party's first Alberta MLA (excepting Chester Ronning, who had been elected in 1932 as a joint UFA/CCF candidate). In the next two years party membership soared from 2,500 to over 12,000.