Proposed tariffs on U.S. imports from China of electronic cigarettes, known as vaping products, could not come at a worse time for the industry. New levies would increase prices just as the industry is facing slowing growth and as it begins to add new health warnings to packaging. The Trump administration has threatened 25 percent tariffs on $200 billion worth of Chinese imports, including vape devices and parts, in addition to tariffs on $50 billion already imposed. As a result U.S. vape manufacturers, who (..)