We examine how special interests, measured by campaign contributions from the mortgage industry, and constituent interests, measured by the share of subprime borrowers in a congressional district, may have in ‡uenced U.S. government policy towards subprime mortgage credit expansion from 2002 to 2007. Beginning in 2002, mortgage industry campaign contributions increasingly targeted U.S. representatives from districts with a large fraction of subprime borrowers. During the expansion years, mortgage industry campaign contributions and the share of subprime borrowers in a congressional district increasingly predicted congressional voting behavior on housing related legislation. Such patterns do not hold for non-mortgage …nancial industry. The evidence suggests that both subprime mortgage lenders and subprime mortgage borrowers in ‡uenced government policy towards subprime mortgage credit expansion.Princeton University and NBER, atif@princeton.edu; University of Chicago Booth School of Business and NBER, amir.su…@chicagobooth.edu; and University of British Columbia, CIFAR, and NBER, ftrebbi@mail.ubc.ca, respectively. The authors would like to thank Alberto Alesina, Daron Acemoglu, Chris Berry, Matilde Bombardini, Patrick Francois, David Lucca, Riccardo Puglisi, and Guido Tabellini for useful comments and discussion. Won-Il Jun provided excellent research assistance. We would also like to thank seminar participants at