NEW: The White House has assured the wife of Min Zin, an American scholar being held hostage in China, that her husband’s release is a “top priority” for Thursday’s Trump-Xi Summit, Sylvia Zin told

"NEW: The White House has assured the wife of Min Zin, an American scholar being held hostage in China, that her husband’s release is a “top priority” for Thursday’s Trump-Xi Summit, Sylvia Zin told "