A few kilometres down the road from Pueblo city, the huge white buildings of Vestas Towers America gleam amid an expanse of rangeland. Billed as the world’s largest wind-tower factory, the plant and three others that Vestas built in the state, starting in 2008, are prime examples of the wind industry’s American manufacturing success story.

But the future looks bleak for the 1,600 people working for the Danish turbine maker in Colorado.