I find it hard to think of anything new to say about this. I'll leave commentary to Adam Serwer:
When one extreme administration embraced torture as national policy, it could be thought of as a panicky aberration. When a succeeding administration, supposedly representing "change," ratifies impunity from any sanction arising from crimes against individuals and international treaties, it settles the United States into a comfortable berth among the world's torture states, on a par with such charming places as Turkmenistan, Egypt and Burma. Lovely.