A study in contrasting styles of mendacity:
President Trump goes to the CIA and lies, easily and comfortably, about the genesis of his dispute with the intelligence community and about the size of the inauguration crowds. He lies easily because ‘truth’ is a meaningless concept to him; he has never had a point of reference for it. He has no consciousness of guilt when he’s spewing falsehoods because he has no moral center from which awareness of guilt emanates for most people.
Sean Spicer appears before the press to tell the same lies, but his awareness that he is lying, his awareness that everyone in the room knows he’s lying, is evident in his defensiveness, his rage, and his cowardice (scurrying away without answering questions.) 
And then there’s Kellyanne Conway's instantly infamous “alternative facts.”
Now comes word that Trump’s promise to release his taxes after the “audit” is as meaningless as everything else he says. No surprise, that.