A conservative, non-partisan public interest group has filed suit against the Federal Housing Finance Agency, claiming the FHFA has improperly denied the groups request for documents relating to the Finance Agencys decision to sue 17 financial institutions last fall on behalf of Fannie Mae and Freddie Mac over alleged misrepresentations of mortgage-backed securities.Last week, Judicial Watch filed its lawsuit in the U.S. District Court for the District of Columbia after the FHFA denied the groups Freedom of Information Act request for documents related to the agencys litigation. The Finance Agency argued that as private companies, FOIA requests do not apply to Fannie and Freddie.