US President Donald Trump said on Monday that his planned trip to Beijing later this month may be postponed, adding uncertainty to a visit expected to include talks with Chinese leader Xi Jinping. Speaking at a news conference at the White House, Trump said the timing of the visit was still under discussion, citing the need to remain in Washington as the US manages its ongoing military campaign against Iran. The trip had been scheduled for March 31 to April 2. “I don’t know, we’re working on...