Proposals to re-empower the U.S. labor movement emphasize the importance of unions to work in coalition with community nonprofits at the local level. An extensive literature analyzes how such cross-organizational collaborations have benefitted unions, such as in their fights to prevent plant closures, to establish or renew union contracts, to organize the unorganized, and to pass living wage policies. This article instead emphasizes the experience of nonprofit organizations that work with unions in local policy coalitions that seek to promote the labor rights of immigrants and other low-wage workers. Drawing on case study material of San Francisco's living and minimum wage campaigns, this article argues that differences in organizational resources, tax-exempt status, and community connections affect nonprofits' role as public policy advocates relative to unions, but not uniformly in the same way across different stages of the policymaking process. While these differences in advocacy assets give unions the means to crowd nonprofits out of the policy enactment process, they enable nonprofits to hold their own in the initial agenda-setting process and even to outshine unions in the final policy implementation process.