Another investigation

The clamor for another investigation -- on the CIA tapes this time -- is tiresome. Congressional Democrats have devoted a year so far to investigations of one sort or another and have little to show for it.  This devotion to investigating instead of doing what Congress is supposed to do, like pass appropriation bills, seems an irresistible compulsion, one that could result in election defeat for Democrats next November. What is the likely outcome of the investigation currently being clamored for? Someone could be embarrassed (besides the Democrat Congress) and someone could lose his or her job. Nothing more is likely to happen. So why waste time and resources on a likely dead end? It's politics.