The White House is ramping up pressure to reach a trade deal with China in the next two weeks, warning that the US is prepared to walk away from the negotiations. “It won’t go on forever,” Mick Mulvaney, President Donald Trump’s acting chief of staff, said on Tuesday. “At some point in any negotiation you go, ‘we’re close to getting something done so we’re going to keep going.’ On the other hand, at some point you throw up your hands and say ‘this is never going anywhere.’” “You’ll know one way or the other in the next couple of weeks,”