On arms sales, he told Fox News, "“I’m holding that in abeyance and it depends on China. It's a very good negotiating chip for us, frankly.”

' is warning the US side in no uncertain terms not to screw around,' says Joe Mazur, geopolitics analyst at consultancy Trivium China

Speaking to reporters as he flew back on Air Force One on Friday, Trump said he’d not decided on the sale, but he added, “I will make a determination.”