President Donald Trump’s declaration on social media of a “total and complete” blockade of sanctioned oil tankers entering or leaving Venezuela is a striking military move that ramps up U.S. pressure ...

Oil exports, the country’s financial lifeblood, have plummeted after the United States took action against three ships that have been used to carry its crude.

Last week, President Trump announced a blockade of all sanctioned oil vessels leaving or entering the country's waters.