(Bloomberg) -- Donald Trump signaled he would again make his stance on China a key part of his US presidential campaign strategy, drawing an unsubstantiated correlation between turbulence in the nation’s equity markets and his runaway Iowa Republican caucus victory.Most Read from BloombergBonds Slide as Fed’s Waller Downplays Need to Rush: Markets WrapMusk Pressures Tesla’s Board for Another Massive Stock AwardApple to Allow Outside Payments for Apps After US DecisionA Wary World Braces for Trum