For almost three months the U.S. has been able to legally export crude oil, but Republican presidential candidate Sen. Marco Rubio is still campaigning on lifting the ban. Rubio told supporters he would lift the ban as president at a private fundraiser in Texas Friday, and his campaign website has an entire page devoted to the need to lift the ban. “I would also allow American oil producers to be able to export,” Rubio said, when asked what he would do about poor oil prices as president. “Right now we’re not allowed to export.” Congress lifted the ban in December...