Socialist Workers' Party of Germany
In the period when the KPD was denouncing the Social Democratic Party of Germany (SPD) as social fascists and retreating from joint anti-fascist work with non-Communists, Brandler and the KPO were strongly in favor of the establishment of a united front against the menace of Nazism and were particularly critical of the Communist Party's conception that "once the Nazis get into power, then will the united front of the proletariat rise and brush them aside". Instead, the KPO called for the immediate formation of a broad anti-fascist alliance including the Social Democratic-controlled trade union federation, the Social Democrats, Communists and the Socialist Workers' Party of Germany (SAPD).