A new bipartisan bill introduced last week that would replace the government-sponsored enterprises Fannie Mae and Freddie Mac with a single, government-owned entity designed to issue and guarantee mortgage-backed securities demonstrates the lack of political consensus – within the Republican party and Congress in general – about how to deal with the GSE problem. The new bill, H.R. 2413, the Secondary Market Facility for Residential Mortgages Act of 2011, would effectively merge Fannie and Freddie into a single government-backed entity that would issue and guarantee MBS. The MBS would have an explicit government guarantee paid for by...