This evening I finished psychologist Bill Eddy's Why we elect narcissists and sociopaths and how we can stop. It turns out, we just need to be rational!
OK, so, that's not likely. But Eddy does lay out the obvious: we need to stop electing narcissists and sociopaths. We also need to watch out for sick politicians dividing us into 4 groups that could work together but don't: Loyalists, Resisters, Moderates, and dropouts. The three groups who don't have automatic loyalty to the narcissist in question always outnumber the Loyalists.
In other words, when a politician says "I alone can fix it," the correct response is to ensure he (it's always "he") never holds any power. Because he will always try to increase his power to the detriment of everyone around him. And he will never fix it.