In an exclusive interview with NDTV, Columbia University Professor Jeffrey Sachs says India should use the changing political situation in the US to push for a straightforward trade proposal with Washington. Sachs questions the legality of Donald Trump's tariff measures and argues that India should seek low, flat tariffs and a return to normal trade relations. He also says India should negotiate from a position of strength, calls for rules-based global trade and urges BRICS nations to support an open trading system.