In the literature on the emergence of the welfare state, the strength of trade unions and the organized working class is often touted as the primary driving force behind the welfare state project. Furthermore, much of the previous literature has tended to assume union homogeneity across countries, federations, industries and professions. What is conspicuously lacking from the current political science literature is a systematic analysis of real-world trade unions’ choice of labor market advocacy focus. Using a qualitative approach and studying both published union material as well as conducting a number of elite interviews with high-level union officials, this thesis studies the degree to which Swedish trade unions’ labor market policy preferences are defined by the union members’ labor market risk exposure and whether the union adheres to white-collar or blue-collar unionism. While the conclusions indeed suggest that labor market risk and blue-collar/white-collar unionism do have a systematic impact on cartain aspects of trade unions’ labor market advocacy, future “large N” studies utilizing alternative methodological approaches will be required to draw more easily generalizable conclusions.