U.S. President Donald Trump on Friday threatened to impose an additional 100 percent tariff on imports from China and hinted at calling off an upcoming meeting with its leader Xi Jinping after Beijing this week announced export controls on rare earth elements essential for high-tech manufacturing.Trump said on social media that the United States will introduce the tariff starting Nov. 1 or sooner, depending on any further actions taken by China, potentially reigniting a trade war between the world's two largest economies.In addition to increasing the prospects of a return to triple-digit ta…READ FULL ARTICLE