Oil slides on U.S.-China tensions, doubts about Russian output cuts

NEW YORK (Reuters) - Oil futures tumbled on Wednesday after U.S. President Donald Trump said he was working on a strong response to China's proposed security law in Hong Kong and as some traders doubted Russia's commitment to deep production cuts. Many worried that Russia may not agree to extending production cuts ahead of the meeting in less than two weeks between the Organization of the Petroleum Exporting Countries and its allies.Brent crude fell 91 cents, or 2.5%, to $35.26 a barrel by..