It would be “wholly inappropriate” for the Treasury Department and the Federal Housing Finance Agency to permit Fannie Mae and Freddie Mac to pursue a potential role in a new yet-to-be-launched $2 billion bond program, according to the top Republican members of the House Financial Services Committee.In an effort to shut down thoughts of potential expansion of the two government-sponsored enterprises into a new line of business, Committee Chairman Spencer Bachus, R-AL, Vice Chairman Jeb Hensarling, R-TX, and four of the committee’s subcommittee chairman dispatched a letter last week to Treasury Secretary Tim Geithner and FHFA Acting Director Edward DeMarco to express their “concern.”