Yeah, trade. That was one of Trump's big selling points to a lot of people and if Biden is the nominee it'll become a repeat of 2016 because Trump will nail him on NAFTA and other trade agreements constantly. He loses that argument as well as his anti-establishment argument when up against Bernie. Strategically it sounds like the surest bet and the Republicans are moving into a strategy that will just fail. Keep America Great? If people don't think their lives have materially improved under your leadership then that sort of tactic doesn't work.
God he was right on the money in that second paragraph, eh.