An attendee holds a sign while waiting for the start of a campaign event with Donald Trump, 2016 Republican presidential nominee, in Des Moines, Iowa, U.S., on Tuesday, Sept. 13, 2016. Any path Trump might take to the presidency inevitably leads through the Rust Belt and industrial Midwest the places the Republican nominee describes as "rusting and rotting" war zones of manufacturing decline. Photographer: Daniel Acker/Bloomberg via Getty Images
