President Donald Trump granted a pardon Friday to a former New York police sergeant who was convicted of helping China try to scare an ex-official into going back to his homeland, a prominent case in U.S. authorities' efforts to combat what they claim are Beijing's far-flung efforts to repress critics.Michael McMahon was sentenced this spring to 18 months in prison for his role in what a federal judge called “a campaign of transnational repression." He insisted he was innocent, saying he was “unwittingly used” when he took what he thought was a straightforward private-investigator gig. M…READ FULL ARTICLE