Here are three articles (out of tens of thousands that are out there) on the Pathological Liar occupying the White House. The answers to the questions they ask in the headlines are, "Yes," "Yes," and "Yes."
Investors.com asks: "Is President Obama a Pathological Liar?"
http://news.investors.com/article/615581/201206201901/obama-tells-stories-to-support-radical-agenda.htm?p=full
Roger L. Simon asks: "Is Obama a Pathological Liar?"
http://pjmedia.com/tatler/2012/05/17/is-obama-a-pathological-liar/
Joseph Curl asks: "Is Obama a Pathological Liar?"
http://www.washingtontimes.com/news/2011/jul/24/curl-is-obama-a-pathological-liar/