In much research on gender and representation, the constraining factors for women’s political representation have served as a backdrop against which women’s activities are contextualized, rather than as a primary focus of research. Research explicitly focusing on men’s overrepresentation in politics does the opposite: it puts the reproduction of male dominance at the center of the analysis. Such a focus on men and masculinities and their relation to political power requires a set of analytical tools that are partly distinctly different from the tools used to analyze women’s underrepresentation. A feminist institutionalist framework is used to identify the logic of recruitment underpinning the reproduction of male dominance. It proposes and elaborates on two main types of political capital that under certain circumstances may reinforce male dominance and resist challenges to it: homosocial capital, consisting of instrumental and expressive rules favoring different types of similarity; and male capital, consisting of sexist and patriarchal resources that always favor men. Although the different types of political capital may be empirically related, they should be analytically separated because they require different methodological approaches and call for different strategies for change.