Nearly a quarter-century after McDonald’s startled and delighted Soviets with their first taste of American fast-food culture, the company’s now facing a suit that could ban it from selling some of its signature products. The Russian consumer protection agency said Friday it is taking the company to court for selling foods that contain more fats and carbohydrates than are allowed by national regulations. McDonald’s did not immediately reply to a request for comment. The suit comes amid especially high tensions between Moscow and Washington over the Ukraine crisis; the United States has slapped an array of sanctions on Russia over...