The White House said yesterday that it would impose tariffs on $200 billion worth of Chinese goods just days after slapping levies on $34 billion worth. China, professing “shock,” has promised to respond, without specifying how. Asian and European markets were rattled by the news this morning. U.S. markets were set to open lower, too. The new U.S. tariffs appear focused on Chinese manufacturing, covering electronics, textiles and auto parts, as well as minerals used in gadgets and batteries.