Without some examples, the conclusion is meaningless. A "lie" is a statement of fact that the speaker knows to be false at the time when he said it. Who decides what is true, false, an exaggeration, or an honest mistake? THAT PERSON decides who lies the most.
President Trump lies all the time ("This is the biggest tax cut in American history!"), but I think listeners understand that and take what he says with a pinch of salt.
Some lies are significant and others are harmless. Telling Americans that the "Affordable Care Act" would save Americans an average of $2,500 per year in lower health insurance premiums is what most would consider a "whopper." Not only false, but egregiously false and intended to deceive people on a significant matter. I suppose Trump has done similar things, but none come to mind.
Suffice it to say, we are living in a golden age of information, when one can check a politician's statements through multiple sources and find out the reality of the matter. It is also the worst of times, when most outlets have an agenda and are peddling a Narrative rather than objective reality.