First you have to show us a lie that he's told. You just disagreeing with him on policy is not a lieIt really is pathetic how easy it is to get the brainwashed trump cultist to come out and foolishly attempt to defend him on a topic like his pathological serial lying. They are the only people in the world that believe anything he says.
Here ya go. Over 100 of them here just for starters.
politifact.com/personalities/donald-trump/statements/byruling/false/