Yes of course. Some surely have an advanced case of NPD. Trump and Putin come to mind. What makes me sure about them having a personality disorder is their utter inability to take criticism on any level. Trump rages when the media isnt too flattery about him. While Putin as a true dictator has simply created a system where criticising him isnt possible anywhere except for the internet. But even that is being worked on. The Duma has passed a law which makes it illegal to "offend" those in power. Both of them like power and only power