Three years ago, Venezuelan doctor Marco Salmeron seemed to have a good case for asylum in the U.S. Salmeron had fled Venezuela because prosecutors there accused him of human organ trafficking – but they’d provided little if any evidence to back it up. Salmeron called the charge political persecution. Still, on a September morning in 2016, U.S. agents from the international police organization Interpol showed up at Salmeron’s home in Pembroke Pines. As his wife and two kids looked on, they