A proposed Senate bill to steadily wind down Fannie Mae and Freddie Mac over the course of a decade appears to have some support at the Federal Housing Finance Agency, where the acting director is eager for Congress to move toward resolving the three-year-old conservatorships of the two government-sponsored enterprises. S. 1834, the Residential Mortgage Market Privatization and Standardization Act of 2011 would gradually reduce the two GSEs over 10 years through an unusual mechanism. Instead of guaranteeing the entire MBS trust as they...