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CHICAGO � Beef prices set records last month at grocery stores, and economists expect they will climb further as demand increases during the summer grilling season that traditionally begins with cookouts on Memorial Day on Monday.

Higher prices hit consumers who are increasingly nervous about the economic impact of President Donald Trump's trade policy and after Washington halted cattle imports from Mexico over a pest called New World screwworm, which could hike up beef prices further by tightening the cattle supply.