Obama is almost as bad as Bush, but Bush set all these precedents so he's partially responsible for this now.
Also, Congressional oversight on this is terrible (DOD Diane and co.).
Also, the press is terrible (David Gregory my wife told me so and co.)
Also, the entrenchment of the military/intelligence/surveillance complex is terrible.
There is plenty of blame to go around and Obama could not white knight everything away on his own in the current environment if that were his inclination (which it isn't) so a little context is useful in understanding why Greenwald, Snowden etc. are seen as villains and unrepentant war criminals and violators of the Constitution are paraded around on network television every Sunday morning as experts.