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Serving as the United States Trade Representative from 2001 to 2005, Robert Zoellick held a pivotal role in shaping U.S. trade policy. During his tenure, he oversaw negotiations for numerous trade agreements, including the U.S.-Chile Free Trade Agreement and the U.S.-Singapore Free Trade Agreement. He also played a key role in the Doha Round of World Trade Organization negotiations and represented the United States in trade disputes before the WTO.