The tariff offensive that President Trump is leading against trade partners across the world will deal a blow to the oil and gas industry next year, according to a report by Deloitte. The consultancy, as quoted by Reuters, noted that the oil and gas industry relies on international supply chains that stand to be affected by tariffs, leading to cost increases of between 4% and 40% for various materials and components such as steel and piping. The U.S. oil and gas industry already warned about the adverse effect of tariffs on costs, citing a certain…