WASHINGTON — Grace Drexel felt a “glimmer of hope” when President Trump said he would bring up her father’s detention in China when he meets with President Xi Jinping in Beijing next week. “This president has just a remarkable way of doing things that most people say are impossible,” she told The Post. “If anyone, this president might be able to bring back my father.” Ezra Jin, a Christian pastor and father of US citizens, was arrested in October as part of a massive Chinese crackdown on