New Delhi, Aug. 4 -- US President Donald Trump's latest sabre-rattling in the ongoing trade battle with China involves a gamble. In a series of tweets, he has threatened to impose an additional 10% tariff on Chinese imports worth $300 billion, effective 1 September. Earlier, he had erected trade barriers against industrial inputs. This will be the first time that products found in local stores and supermarkets will be priced up-or pulled off shop shelves-by his policy. Consumer electronics, apparel and a vast variety of manufactures would be covered....