First of all he inherited the economy and even regular everyday knucklehead voters know that much. So he is not responsible for its growth. However, the real reason he is not winning reelection is because there was a massive swing towards Democrats in the House of Representative and in several Governor offices. To make matters worse him he is going to be impeached and the majority of Americans believes that he needs to be kicked out of office. Mind you now Trump's approval rating is barely 40% and most voters see him as a buffonish Russian loving dikkhead. He is not winning reelection. He will be lucky to avoid prison.