COLUMBUS, Ohio -- “As Ohio goes, so goes the nation,” once described presidential politics. Today, it may fit Democrats’ voter registration troubles instead.

New analysis shows the party losing voters in blue strongholds, red bastions and battlegrounds alike.

“It’s a worldwide trend,” said David Niven, a politics professor at the University of Cincinnati politics professor. “Labor in the (United Kingdom) is losing laborers. The old alliances have fallen.”

What’s shifting isn’t only the numbers, but the makeup of each party.

Democrats are watching some of their old pillars — union households and working-class voters — slip away, even as younger and urban supporters prove harder to turn out. Republicans, meanwhile, are finding fresh strength by drawing unaffiliated voters into their rank

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