This study explores how the candidate selection process impacts women’s political participation and electoral success in national elections. Research shows that women often receive less financial support than men, limiting their campaign competitiveness by restricting access to resources like advertising and staffing. These disparities stem from gender biases, limited donor networks, and fewer endorsements from key organizations. However, less is known about how these biases manifest at the nomination stage. We examine women’s access to networks, financial constraints, and competitiveness in selection. Our findings indicate that women have similar networks, face equally competitive selections, and spend comparable amounts to men. This suggests that biases in the nomination process arise more from party structures than differences in preparation. Despite these challenges, women with equal financial backing are as likely, or more likely, to win elections, highlighting the importance of equal campaign funding for improving women’s representation