Oil prices were volatile on Tuesday after markets were spooked by surprise comments from White House trade adviser Peter Navarro saying a hard-won U.S-China trade deal was “over”, though he later said his comments had been taken out of context.  Jangled nerves were also soothed to some degree after U.S. President Donald Trump later tweeted that the China trade deal was fully intact, adding he hoped China would continue to live up to the terms of the agreement. Brent crude fell by 7 cents, or 0.1%, to $43.01 a barrel by 0253 GMT, after earlier skidding to a session low of $42.21. U.S. oil was down 14 cents, or 0.3%, at $40.59 a barrel, having dropped to a low of […]