Scary and thoroughly depressing:
Even if Trump supporters have a normal IQ, they by and large have mentalities of toadstools. This is no more evident than in the streeters (off-the-cuff interviews) at Trump rallies where they demonstrate little, if any, rationale (cogent or otherwise) for their professed intention to vote for Señor Hitler, no matter what.
All the news outlets regularly feature such streeters, but the best presentations often come from quasi-news programs, such as The Daily Show with Trevor Noah — and I strongly recommend watching last night's edition (which you can find streaming on Comedy Central). Absolutely mind-boggling!

EDIT: I've been advised that Comedy Central streaming directly via the Internet might not be available in certain Canadian jurisdictions. It may be available on one of the subscription services, such as Netflix or Crave (although I don't have a clue in that regard).