Students leave school at the end of the day at the Global Impact STEM Academy. Maddie McGarvey for NPR hide caption

People attend the Independents' Day Festival in the Franklinton neighborhood of Columbus, Ohio. The city has become a nearly recession-proof hub. Maddie McGarvey for NPR hide caption

Kids bike on Selma Road in Springfield, Ohio. "Springfield is a rather typical small city that has grown poorer over the years," former mayor Roger Baker says. Maddie McGarvey for NPR hide caption

Darren Holly steers coils of steel through Pentaflex, a manufacturer of parts for heavy trucks, in Springfield, Ohio. Maddie McGarvey for NPR hide caption

Sen. Kelly Ayotte, R-N.H., and Sen. John McCain, R-Ariz., seen here in 2012, are both facing competitive elections in 2016. Charles Krupa/AP hide caption

Sheikh Mohammed bin Rashid al-Maktoum, prime minister of United Arab Emirates, wears traditional dress as he listens to an Emirati employee while visiting al-Maktoum International Airport in Dubai. Kamran Jebreili/AP hide caption

Factories have been closing in southwest Ohio for years. This Delphi factory in Dayton shut down in 2006. Economists say that to a large degree, the decline in middle incomes reflects the loss of factory jobs. J.D. Pooley/Getty Images hide caption

Crime scene investigation vehicles drive to the location of a multiple shooting in Pike County, Ohio, on April 22. John Minchillo/AP hide caption

Authorities set up road blocks at an intersection at the perimeter of a crime scene, on Friday in Pike County, Ohio. John Minchillo/AP hide caption

When deductibles and copays are high, quite a few people with insurance turn to free clinics for care. Jens Magnusson/Ikon Images/Getty Images hide caption

Technicians and engineers work on a 2017 Acura NSX at the Honda Motor Co. Acura Performance Manufacturing Center in Marysville, Ohio, on March 8. Bloomberg via Getty Images hide caption

Police stand guard during demonstrations in reaction to a Cleveland police officer being acquitted of manslaughter charges on May 23, 2015, in Cleveland. Ricky Rhodes/Getty Images hide caption

Confetti falls on the head of John Kasich, governor of Ohio and a 2016 Republican presidential candidate, after speaking during a campaign event in Berea, Ohio, on Tuesday. Kasich secured his first victory on Mega Tuesday. Ty Wright/Bloomberg via Getty Images hide caption

Audience members hold up signs supporting Republican presidential candidate Donald Trump during a campaign rally in Boca Raton, Fla., on Sunday. Paul Sancya/AP hide caption