U.S. footwear imports increased 6.5 percent in value and 3.1 percent in volume in November, as China’s shipments continued to slip. Footwear imports from China declined 0.3 percent in the first 11 months of 2018 to $12.9 billion worth of goods, compared to increases of 14.1 percent to $5.66 billion from Vietnam, 5.1 percent to…