Goldman Sachs Group Inc. (GS) is contemplating buying tax credits from Fannie Mae (FNM). However, it may be reasonable to assume that the U.S. Treasury may not approve of the deal. Goldman hopes to receive approval this week for $1 billion worth of tax credits. Tax credits are incentives designed to bring more investment to low-income housing developments. This would help the company reduce its tax bill as well as bring some much-needed financial relief to Fannie Mae. While financial details of the proposed transaction are not disclosed, Goldman could arrange other investors for the deal as well. The Obama Administration, however, is opposed to the deal, as it will reduce Goldman's tax bill at a time when Wall Street is already facing intense public scrutiny. Fannie Mae, a government-controlled mortgage financier, could get financial relief if Goldman bought the tax credits. As ...