S ince the early 1990s, women have slowly increased their presence in Congress. However, a gap has opened up such that the number of Democratic women far outpaces the number of Republican women. Indeed, in the 114th Congress, women constituted one-third of the Democratic caucus but less than 10% of the Republican caucus (Center for the American Woman and Politics 2015). To better understand the electoral environment women candidates face and how challenges vary for Republican and Democratic women, we focus on one of the most critical elements of a viable candidacy: fundraising. Previous studies of the impact of gender on fundraising analyze general election nominees but do not evaluate differences in the experience of all primary candidates. Moreover, past studies do not fully examine differences in sources and levels of financial support across all partisan and gender groups, including Democratic men and women and Republican men