New Delhi, March 20 -- US President Donald Trump's shock decision to impose tariffs on pharmaceuticals from April has put the spotlight on one of the most worrisome problems in international commerce-the absence of a global trade regulator. The World Trade Organization (WTO) has been dying a slow death over the past decade, and even its most trenchant critics have been troubled by the deliberate attempt of the US, which, ironically, championed its formation, to shackle the apex trade regulatory body. With Trump in his second term resorting to more impulsive, aggressive tariffs and violating one of the basic tenets of WTO, there is no recourse for trading partners except retaliation, as the 166-member organisation has no means to challenge...