As with many industries now fretting over the uncertain future of U.S. trade policy, the oil business is sizing up the potential impact of the various protectionist measures being bandied about Washington – which have sent crude markets into a tizzy. The trade proposal with the most momentum may be the controversial tax reform, pushed by Republicans in Congress, that could slap a tax of up to 20 percent on all imports, including crude oil. That would spark a rise in fuel costs across the country that would hurt East and West Coast refiners more than those near the Gulf of Mexico. It would also hit the pocketbooks of drivers and airline passengers, as refiners pass on the nearly $30 billion that the tax could cost them each year […]