In a defiant display of “America first” brinkmanship, Washington’s top trade negotiator on Thursday sought additional funding to support US President Donald Trump’s new trade wars, insisting the administration will not be held hostage by Beijing’s retaliatory tactics ahead of a high-stakes leaders’ summit next month.With Trump set to meet Chinese leader Xi Jinping on May 14-15, US Trade Representative Jamieson Greer used the agency’s budget hearing to draw a hard line: the US is doubling down...