Home Latest U.S. crude weakens after Trump calls on OPEC to keep output Latest U.S. crude weakens after Trump calls on OPEC to keep output By Genpie - November 12, 2018 58 0 Facebook Twitter Google+ Pinterest WhatsApp U.S. crude prices turned negative as U.S. President Donald Trump said he hoped there would be no oil output reductions, after Saudi Arabia said OPEC was considering cutting supply next year, citing softening demand.