U.S. President Donald Trump has invited heads of commodity trading firms, Vitol and Trafigura, to the White House for talks on Friday regarding the marketing of Venezuelan oil, Reuters has reported. Whereas the Trump administration has tapped U.S. oil majors to play a leading role in extracting and selling crude from Venezuela, the giant European firms are some of the largest oil traders in the world, and undoubtedly have the requisite expertise to market oil from Venezuela. Vitol delivered an average of 7.2 million barrels per day…