House GOP staffers, looking to drive a wedge between Fannie Mae and Freddie Mac and their Democratic supporters, have released a new report that concludes the GSEs have used very questionable – but not illegal – strategies to meet statutory affordable housing goals. According to the nine-page report, Fannie and Freddie engaged in large-scale transactions at the end of the calendar year that put a lot of goal-qualifying loans on the enterprises’ books, but that…