 The controversy over the Communist Party of America-sponsored Trade Union Educational League's role within the American Federation of Labor (AFL) is an example of whether dual unionism occurred.Although rarely stated as such, the ejection by the American Federation of Teachers of several locals in the 1930s for communist domination and factionalism is another example of a struggle over dual unionism.Another example of dual unionism is the suspension by the AFL in August 1936 of the unions which formed the Committee for Industrial Organization (CIO).