Bush : ` ` We must respond appropriately , '' says a Justice Department official . Sen. Grassley 's campaign demands answers from Attorney General Holder . At issue is a February 2011 memo that includes a DOJ letter to Sen .
NEW : `` We will respond appropriately , '' says a Justice Department official . Sen. Grassley 's letter demands answers from Attorney General Holder . At issue is a February 2011 memo that preceded a DOJ letter to Grassley .