The families of two Americans detained in China for more than a decade are calling on President Donald Trump to use his visit to Beijing to work for their release. Both Dawn Michelle Hunt, 54, and Nelson Wells, Jr., 52, have been held since 2014, unwittingly caught up in drug trafficking schemes, their families said. Now, their mental and physical health is suffering after years behind bars. Hunt was scammed while participating in what she thought was a free trip to Hong Kong, mainland China, and ultimately Australia, her brother Tim Hunt said. While in mainland China, she was gifted…