There’s no such thing as Trumpism. It’s plain old fascism and should be resisted with the same methods as fascism has always been resisted. Trump and his followers refuse to argue on facts, so it would be foolish to try and “win” a Trump follower over with facts or even arguments. Point out each and every inconsistency and lie no matter how small, show how ineffective Trump is in delivering his grandiose promises and never waiver in calling Trump for what he is. A small minded demagogue who caters to the poor and uneducated on the one side and the opportunists on the other side.