From the very first convention, certain divergent union tendencies were in conflict. The Workingmen's Union of New York City expressed opposition to a call by the officers of national unions for a "National Convention of Trades." The compromise that avoided an impasse allowed organizations such as eight-hour leagues, composed of individuals supportive of labor but not themselves workers, to send representatives. Thus, due to suspicion of the large, national unions of skilled craftsmen by a general workmen's union, reformist political groups became a part of the National Labor Union. One of the problems with the NLU was the inability to levy an authorized annual dues assessment of twenty-five cents per member, because of "the difficulty in determining who were actually members."