Wisconsin calls itself America's Dairyland, but just outside the small town of Wausau you can find a less traditional crop - ginseng.

It is said to be among the finest in the world and certainly Will Hsu, the managing director of Hsu Ginseng, believes it is. ...

The crops ready for harvesting this year were planted in 2013, long before President Trump was elected, let alone before he started a trade war with China.

But earlier this year, after the Trump administration started putting tariffs on Chinese exports to the US, China slapped retaliatory import fees on a host of American products, including ginseng.

For Will Hsu that has been very painful.