Clay Masters

Clay Masters is a reporter for Iowa Public Radio and formerly for Harvest Public Media. His stories have appeared on NPR

For decades, many presidential candidates campaigning in Iowa have made sure to offer their loud support for ethanol — the fuel made from corn.

Ethanol is an important industry in Iowa. The state is the top producer of ethanol in the nation, accounting for 28 percent of national production, according to the U.S. Energy Information Administration.

But this election cycle, ethanol is not the campaign force it once was.

Take the contrast between George W. Bush's 2000 presidential campaign and the current campaign of his brother, Jeb Bush.

Iowa City librarian Jason Paulios pulls out his smartphone, enters his library-card number and begins downloading an album by local metal band Blizzard at Sea.

"So it's extracting now," he says, eyes on the screen. "It's at about 90 percent."

The download takes about five minutes to complete. Paulios says it's a great way to check out local music: You could be waiting for a concert to start, download an album by the band you're about to see and then listen to it on the way home.