American farmers fear being caught up in Trump's trade wars

At world's largest farm show many say US government aid has helped ease their pain - but what they want is trade security

It's been a long, strange summer for America's corn belt. The weather has been perfect. Farmers are expecting a record soybean crop. But at the world's largest farm show in Boone, Iowa, this week the talk was of where they will sell it, tariffs and Twitter.

For months, America's farmers have been "at the spear point" of an international trade dispute started by the Trump administration, says Davie Stephens, a Kentucky farmer and vice-president of the American Soybean Association. Now there are signs of a breakthrough as Canada and Mexico get closer to cutting a deal.