Federal housing policy reveals an unexpected political cycle of Republican innovation and Democratic appropriation. The political trajectory of rental housing vouchers since their inception reveals a partisan policy cycle. Vouchers were originally proposed as a Republican alternative to Democratic public housing construction and slowly emerged as a viable component of housing policy in the United States. In the mid-1990s, a shift occurred in which Democrats embraced vouchers and Republicans retreated from their innovation. This article suggests a partisanship model of policy making that both challenges and supplements conventional models of the policy process.