Another bipartisan bill to overhaul the federal mortgage finance system introduced by two House members this week would eliminate but effectively merge Fannie Mae and Freddie Mac, replacing the two GSEs with a “secondary market facility” that would issue and guarantee mortgage-backed securities.The bill, H.R. 2413, the Secondary Market Facility for Residential Mortgages Act of 2011, would create a single entity, owned by the federal government, that would issue MBS. The MBS would have an explicit government guarantee paid for by a guarantee fee set by the Federal Housing Finance Agency.