The world’s biggest international trading houses, which couldn’t trade Venezuelan oil for years due to the sanctions of the first Trump Administration, are back in the business, with the backing and blessing of the U.S. Following the capture of Nicolas Maduro and the U.S. takeover of Venezuelan oil sales, Vitol Group and Trafigura were authorized by the Trump Administration to help market the oil from the world’s biggest crude resource holder. The trade could be potentially very lucrative for the trading houses, which would reap…