Mark Weinraub covers commodities for Thomson Reuters. He is based in Chicago and focuses on the corn, soybean and wheat markets. He also reports on the impact of U.S. agriculture policy on trade and the farm community. Mark joined Reuters in 1996, as a news assistant in the Washington Bureau. He also was part of the equities desk in New York, writing about Wall Street, beverage companies and the telecommunications industry. He is a graduate of the Medill School of Journalism at Northwestern University.