Pentagon Papers whistleblower, Hedges v. Obama plaintiff, and activist Daniel Ellsberg says Obama should be impeached for signing the NDAA:

"As a law, the provision is "unprecedented, but as a practice – what we've seen for the last 10 years is a systematic assault on the Constitution of the United States in every aspect – in the aspects of the illegal surveillance, the warrantless surveillance, which was conducted against me 40 years ago by President Nixon and then led to his impeachment proceedings, but is now regarded as legal. That's the way the law has changed."