i don’t think his personality traits are that relevant beyond how he rallies his supporters.

fascism tends to put narcissists and other specific types of people in power, but they are put there by capitalism (or: the powers that be) when they need such a leader. fascism is not an organic and normal thing to happen to people, and its definetly not exclusively trumps merit here.

looking back, historically, that happens whenever the US invades you to pacify bring democracy or when crisis that shakes the very core of the system looms.