Trump tariffs: What does the US Trade Representative actually do?

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Another day, another Senate confirmation hearing for one of Donald Trump's top team, this time Jamieson Greer, the nominee for US Trade Representative. So all the talk was of tariffs. China has filed a World Trade Organisation (WTO) complaint against US president Donald Trump's 10% tariffs on Chinese goods after a trade war between two global powers began this week. What does Pascal Lamy, former director general of WTO have to say? We hear from Gene Seroka, the Executive Director of the Port of Los Angeles, the busiest container port in North America. And more than 100 farmers in County Kerry in southwest Ireland, are set to become millionaires. The latest business and finance news from around the world, on the BBC.