President Obama this week affirmed his view that Fannie Mae and Freddie Mac should be wound down through a “responsible transition” to a new mortgage finance system that preserves the 30-year fixed-rate mortgage while emphasizing private capital. In a highly anticipated speech in Phoenix this week, Obama listed among his key reform principles that private capital should be in a first-loss position and the government should provide an appropriately priced, explicit guaranty to ensure continued access to the 30-year FRM. Those are the major components of the bipartisan reform legislation drafted by Sens. Bob Corker, R-TN, and Mark Warner, D-VA, although the president did not mention the bill by name. Obama also said...