US President Donald Trump has said that he had no knowledge that Washington imports Chemicals and fertilizers from Russia.....Trump's statement came after India said that U.S. continues to import from Russia uranium hexafluoride for its nuclear industry, fertilisers, as well as chemicals. When asked by a reporter whether the US imports chemicals and fertilisers from the US, Trump was unaware. The comment came a day after Trump said that the United States would "substantially raise" tariffs on India over its purchase of Russian oil. Meanwhile, Brazilian President Lula da Silva has turned down his US counterpart Trump's offer to call him anytime to discuss tariffs, saying Rio de Janeiro would instead use all available resources, including the World Trade Organisation (WTO), to defend its interests.