US leader Donald Trump personally urged President Xi Jinping to help end the Ukraine war, as he sought to lean on Beijing’s sway over Moscow to resolve a conflict that is now in its fifth year, multiple sources have said.According to people familiar with the discussions at last month’s leaders’ summit in Beijing, Trump told Xi that Russia-Ukraine negotiations were stalled and pressed him to bring Russian President Vladimir Putin back to the table to negotiate with Ukrainian leader Volodymyr...