Donald Trump clearly doesn't have the intellectual capacity to have a concept of what he's doing. I think he has a very strong instinct for using lying to assert power, and that's what he does. Every time he lies, he's saying "I can say whatever I want, whenever I want to, and there's nothing you can do about it." I think he understands that instinctively. He has a finely honed sense for power and manipulation. Bullying is another way to put it. He's a highly skilled bully, but bullying is not a very sophisticated strategy.