Charles Krauthammer comments:
The reason Pelosi raised no objection to waterboarding at the time ... is not because she ... suffered a years-long moral psychosis from which [she has] just now awoken. It is because at that time [she was] aware of the existing conditions ... and concluded that on balance it was a reasonable response to a terrible threat.
You can believe that Pelosi ... underwent a radical transformation from moral normality to complicity with war criminality back to normality. Or you can believe that [her] personality and moral compass has remained steady throughout the years, but changes in circumstances (threat, knowledge, imminence) alter the moral calculus attached to any interrogation technique.
You don't need a psychiatrist to tell you which of these theories is utterly fantastical.
But if you do, Krauthammer was, in fact, a psychiatrist.