The Trump administration is after Venezuela’s oil with its military campaign against the South American country, the president of Colombia, Gustavo Petro, told CNN in an interview. “(Oil) is at the heart of the matter,” Petro told the U.S. news outlet. “So, that’s a negotiation about oil. I believe that is (US President Donald) Trump’s logic. He’s not thinking about the democratization of Venezuela, let alone the narco-trafficking.” The Trump administration has stepped up the pressure on Venezuela,…