There’s a popular misconception trump is an idiot - he’s under educated and has a learning disability that discourages him learning further. He’s very clever with people and can charm them for 5 minutes while stealing their wallets. Remember he runs his own brand, and surrounds himself with people like himself… clever with people but with no strong logic or science background.
Our real problem is that he is good at fooling people like himself; people who are functional in society but could not flip their own breaker when the lights go off. There are a lot of those people, and they have no concept of long term consequences for their short term actions.