Steel and aluminium take centre stage in the president's latest trade spat but the protectionist agenda is being increasingly called into question by financial market investors and US firms.

and are certainly gaining popularity across the world," she said. "Ultimately, the illegal trade in HFCs is fueled by ongoing demand for the gases, primarily used in the cooling sector ...

and drawing upon the experience in international trade of its sister company in Russia, rapidly to develop a world-wide trade organization. Many countries will come to the United States for ...