BRUSSELS — United States lawmakers have urged European Commission President Ursula von der Leyen to resist Trump administration pressure to water down pollution rules for the oil and gas sector. In a letter , shared with POLITICO, 24 members of the House and Senate said ceding to demands from the U.S. Department of Energy to exempt American oil and gas from a regulation aimed at clamping down on methane pollution "would be a misguided approach." The signatories were all Democrats and were led