U.S. crude oil climbs up from roughly one-month low as Iran, trade-deal tensions tug at market

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U.S. crude-oil prices pushed into positive territory early Wednesday, recovering from their lowest close in over a month a day earlier, as increasing tensions between the U.S. and Iran and the threat of disruptions to supplies in the Middle East are weighed against worries that a protracted trade conflict between the U.S. and China could hurt energy demand.