This is a biology question – not a sociology or demographic one – and I’ll give you a hint: it isn’t the neocortex. Some people have accused Trump supporters of lacking in brains, but I think that’s unfair. Trump voters have brains, but those (later, primate) areas involved in reason, advanced learning, and analytic thought are somehow disconnected from the (earlier on the evolutionary scale) parts of their brains that generate aggression, hate, and fear. So whence Trump votes?
A: The Limbic System
The limbic system is a convenient way of describing several functionally and anatomically interconnected nuclei and cortical structures that are located in the telencephalon and diencephalon. These nuclei serve several functions, however most have to do with control of functions necessary for self preservation and species preservation. They regulate autonomic and endocrine function, particularly in response to emotional stimuli. They set the level of arousal and are involved in motivation and reinforcing behaviors. Some of these regions are closely connected to the olfactory system, since this system is critical to survival of many species.
Hark, I smell a Trump!
Coming soon: A Combover in the Crowd (Fear and Loathing on the Trump Trail, Part I).