Oil loadings on tankers at Venezuelan ports have declined following the latest U.S. threat of tanker seizures, with most vessels traveling only between local ports, Reuters has reported. The Trump administration has stepped up pressure on Venezuela by going after its sanctioned tankers, seizing two and pursuing one more over the past few days. One of these was empty and on the sanctioned vessels blacklist—the one that the U.S. forces seized this weekend—but the other was a non-sanctioned tanker loaded with crude that was en route to…