A grand jury examining Hunter Biden's tax affairs has heard from a witness who was asked about the identity of 'the big guy', mentioned in an email discussing a potential business deal with a Chinese firm. The question was asked at a secret hearing in Wilmington, Delaware - although what the unidentified witness said in response has not been reported. It stems from a March 2017 email discussing a joint venture with a now-defunct Chinese energy company, CEFC China Energy Co. A former Hunter-associate previously claimed the phrase 'the big guy' referred to President Biden himself, sparking calls for him...