Advice for Diogenes

I've been watching and listening to the political campaigns for some time now and have a question. Do the parties have a training school or course to teach the candidates to lie with a straight face, or does it come naturally to them? 

I think maybe it's both. Natural liars have their skills honed by the political apparatus. It appears to me that the Republicans do a better job. The Democrats tend to have more visible tells when they're being untruthful. Perhaps the Republicans have lied to themselves so much that they actually believe what they say in contradiction to the truth. 

Either way, Diogenes should keep his search outside of Washington, D.C. and our state capitals, our county courthouses and our city halls.