Donald Trump’s 2016 presidential campaign relied heavily on the promise of restoring those jobs, a message that helped him win Ohio, Michigan, Wisconsin and Pennsylvania. Significant to his Ohio victory was flipping the Mahoning Valley from blue to red. In the summer of 2017, Trump visited Youngstown, signaling the importance of the region to his re-election prospects. “Don’t move; don’t sell your house,” he said. “We’re going to fill up those factories.”