RACINE — Although skies were clear and the sun shone on the United Mine Workers of America’s 86th annual Labor Day celebration at John Slack Memorial Park in Boone County, there are storm clouds on miners’ horizon that threaten union gains and goals.

The storm clouds not visible to the naked eye stem from who wasn’t there.

Mike Tony covers energy and the environment. He can be reached at mtony@hdmediallc.com or 304-348-1236. Follow @Mike__Tony on Twitter.