Michelle Brouhard explains how the U.S. energy sector is entwined with the global oil trade, and how a U.S. export ban would affect the system. She notes that prices would fluctuate around the country and U.S. maritime rules would make moving energy around more difficult. It would also make the U.S. look like an “unreliable supplier” to the rest of the world. The move would also “exasperate” global energy prices, with a total of 25-30 million barrels per day disappearing from the market.