President Donald Trump arrives for the premiere of first lady Melania Trump's movie "Melania" at The John F. Kennedy Memorial Center For The Performing Arts. (Photo: AP)US President Donald Trump has warned the United Kingdom against getting into business with China after British Prime Minister Keir Starmer and Chinese leader Xi Jinping hailed a reset in relations. His visit comes amid Trump’s on-off threats of trade tariffs and pledges to grab control of Greenland, an autonomous territory of Denmark, which have rattled long-standing U.S. allies, such as Britain. Starmer said Britain would ‍not have ⁠to ​choose between closer ties with the United States or China, highlighting Trump’s visit to Britain in September where they announced ⁠150 billion pound of US investment into Britain. Trump ⁠has threatened to impose tariffs on Canada if it goes through with economic deals struck with China on a recent visit by its leader Mark Carney.