SNL missed a good visual in this. When Cohen says Trump did not know about the Stormy payment, the lie detector should have started smoking and eventually blow up.
Trump pardoning Scooter Libby is of course a shot to Cohen that he will be pardoned if he keeps lying. You know, Trump paying to keep people quiet. Which just in itself is obstruction of justice. I suppose it all depends on how many years Cohen is looking at in New York.