President Obama as Prevaricator of the Year? Don't sell the man short. In my opinion he's blown by his predecessor with flying pastel rainbow colors.
But I wouldn't say BHO thinks himself a liar. Allow me to paraphrase a review of al-Sahaf, emphasis mine:
"In an age of spin, [BHO] offers feeling and authenticity. His message is consistent -- unshakeable, in fact, no matter the evidence -- but he commands daily attention by his on-the-spot, invective-rich variations on the theme. His lunatic counterfactual art is more appealing than the banal awfulness of the Reliable Sources. He is a Method actor in a production that will close in a couple of days. He stands superior to truth."
-- Jean-Pierre McGarrigle