Oil flat, near highest since March, after Trump assurance on China trade

NEW YORK (Reuters) - Oil prices were little changed on Tuesday, hovering near their highest levels since early March after U.S. President Donald Trump soothed jangled nerves over U.S.-China trade.Prices rose a day after Trump wrote in a tweet late Monday that the trade agreement was "fully intact". Markets had been unsettled by surprise comments from White House trade adviser Peter Navarro who said the hard-won deal with China was "over"."Oil prices need a healthy relationship between the U.S...