U.S. President Donald Trump on Monday stateside warned of steeper tariffs on China if exports of rare-earth magnets were curbed, threatening a precarious trade truce between the world’s two largest economies. “They have to give us magnets, if they don’t give us magnets, then we have to charge them 200% tariffs or something,” Trump told reporters after a meeting with South Korean President Lee Jae Myung at the White House on Monday. Trump also said that airplane parts were a key leverage that Washington has to counter Beijing’s grip on rare earths: “200 of their planes were unable to fly because we were not giving ... (full story)