Developing a novel theory of "partisan-gender identity," defined as a categorical identity that sits at the intersection of one's partisan affiliation and gender identity, Gendering the GOP argues that Republican women in Congress are not merely gender-blind partisans. In fact, polarization and party competition have incentivized Republican women to organize around their partisan-gender identity and distinguish themselves from both Democratic women and Republican men. In so doing, Republican congresswomen have increased their visibility as party messengers, while simultaneously upholding a party culture that limits women's presence and power in the institution. Through extensive interviews with women members of Congress and in-depth analyses of House floor speeches, Wineinger details how women have both navigated and shaped existing gender dynamics within the House GOP conference.