Leon Trotsky and his far-left supporters roundly criticised the Popular Front strategy. Trotsky believed that only united fronts could ultimately be progressive, and that popular fronts were useless because they included non-working class bourgeois forces such as liberals. Trotsky also argued that in popular fronts, working class demands are reduced to their bare minimum, and the ability of the working class to put forward its own independent set of politics is compromised.