This paper deals with leftist politics in the Western Algerian region of Oran during the mid-1930s. During the Popular Front, Communists, Unionists but also Socialists and Radicals were part of a general movement which met with “indigenous” political movements, above all with the Muslim Congress. Divisions between the national Algerian movement and the French left had not at that time been addressed. Although the interactions were limited, they were also vital and important. Through the exchange of ideas, the parties involved conceived and promoted a reformist program for colonial Algeria.