"I think Democrats should be concerned about what is their message that's going to appeal to these voters," Hanson told ABC News. "They didn't do so well in responding to Trump's use of campaigning against trade agreements in 2016. That seemed to work pretty well for him."
Jonathan Hanson, a lecturer at the Gerald R. Ford School of Public Policy at the University of Michigan, said Democrats should keep thinking about how to reach union workers.
"What I think the UAW leadership is doing is really trying to put pressure on the president," said Hanson, with the University of Michigan. "I think they know that Biden is wanting their support in the upcoming election next year, and they're using that as leverage."