A simple tweak by the Commerce Department would allow the U.S. to begin selling ultralight fossil fuels overseas, a significant first step in easing the 39-year-old ban on crude exports, a new report says. The analysis released by Sen. Lisa Murkowski, R-Alaska, focuses on condensate, a natural gas liquid made up of light fuels such as propane and butane. The fuels generally flow as liquids at normal temperatures even if they’re gas underground. Though it is chemically different than crude, condensate is swept under the oil export ban — at least as long as the light hydrocarbon is coming out...