If the narcissist is going to be brought down, they will also seek to bring everyone else around them down to vindictively make them suffer. The internet and social media are certainly useful as lives can be ruined with a single tweet. But so are guns and rifles, poison, and even assassins for hire. And if they command a country, they can put the security organs or the military to work on their behalf.
As the end nears, the suffering of others is paramount to the malignant narcissist. It is their way of elevating themselves—sick as that sounds—by malevolently paying back society with even more suffering.
And of course, in politics, much harm can be done when power can be wielded—but the worst comes when a malignantly narcissistic leader or head of state, severely flawed of character, claims that only they can fix things, that only they can shape the future, that only they have the answers, and that only they have a grand vision for the future and so out of necessity they must stay on to save us. When you hear that, it should give you pause. That is when we have to worry the most.
This is what we have to look forward to if Trump loses.