I must respectfully disagree. He is a very bad liar. Remember how easy it was to tell when Clinton was lying? His demeanor literally changed; reminded me of one of my kids if/when caught doing something wrong. THAT look. It was so easy to see.
Obama is even more used to lying, but he's not convincing at all. He's SO obviously lying; just saying whatever he wants, damn the truth or facts.
I think his lies are easy for you an I to see but I think Obama supporters and fence sitters do not see through his lies like conservatives or even the well informed do. Many people find him charismatic...and an eloquent speaker..but I do see you point.