In Cicero’s time, the internet connections were much slower, making it harder to fact check liars.

In all seriousness though, most politicians’ lies start with a kernel of truth, making the lies a cocktail of true and false. Trump and his team just say things that are patently untrue. This is where he’s a bit like a magician, except that everyone knows that when a magician says they can read minds, the magician is lying.

There are literally whole websites dedicated to fact checking his lies and laying them bare. Where most politicians might say something like “My opponent’s position on international trade is inferior to mine,” which may or may not be true, Trump will say, “My trade policies increased GDP by ten kagillion percentacles! Boom!” All this would be fine if he weren’t a) a racist, b) a puppet of a foreign power c) deeply corrupt and e) the most powerful man in the world.