US President Donald Trump has said he is not optimistic about the release of former Hong Kong media boss Jimmy Lai Chee-ying, who was sentenced to 20 years for violating the national security law, after raising the issue with Chinese counterpart Xi Jinping during his visit to Beijing.“[Xi] said Jimmy Lai is a tough one for him to do; he went through a lot, right or wrong, they went through a lot,” Trump told reporters on Air Force One during his return flight to the United States.When asked...