For the second time in less than a year, Fannie Mae’s and Freddie Mac’s conservator has gone to court in Illinois to assert that the two federally chartered government-sponsored enterprises are exempt from certain local and state property assessments. Last week, the Federal Housing Finance Agency filed suit in the U.S. District Court Northern District of Illinois, Western Division, against the Illinois Department of Revenue and county clerks to block local government efforts to collect real estate transfer taxes from Fannie and Freddie. The FHFA suit was in response to litigation filed by DeKalb County and five other counties to compel...