Donald Trump went to Detroit on Monday, using the notoriously blighted city as a backdrop for a major economic policy speech. He built his narrative arc around Detroit’s rise and fall, claiming that his agenda would bring back manufacturing jobs and thereby revitalize “cities like Detroit.”

“When we were governed by an America First policy, Detroit was booming,” Trump said. “When we abandoned the policy of America First, we started rebuilding other countries instead of our own. … The factories and neighborhoods crumbled in Detroit. … The city of Detroit is the living, breathing example of my opponent’s failed economic agenda.”

It’s true that Detroit and other Rust Belt cities such as Cleveland and Buffalo suffer from high unemployment, high poverty, declining population, dropping home values, and crime. Unfortunately, Trump completely misdiagnoses the causes and offers no actual solutions.