But our Presidents do (Reagan, Clinton, Obama).
Obama is a skilled politician. He lies with absolute conviction.
Mass communications and TV has heightened the demand for a "charismatic and smooth" President which, unfortunately, emphasizes from over substance. Hillary has little substance but she also has little charisma - may be a reason why Hillary might lose. Rand is substantive but kind of awkward and stiff in his public-speaking style which could be a fatal weakness. I haven't seen enough of Ted Cruz, but maybe he could pull it off.