The motivation for blocking investigations into Bush lawbreaking

Glenn Greenwald writes in Salon: “With regard to illegal Bush programs of torture and eavesdropping, key Congressional Democrats were contemporaneously briefed on what the administration was doing (albeit, in fairness, often in unspecific ways). The fact that they did nothing to stop that illegality, and often explicitly approved of it, obviously incentivizes them to block any investigations or judicial proceedings into those illegal programs.”