Trump said the White House released documents that he said expose vulnerabilities in electronic voting.
Trump in December authorized an $11 billion arms package for Taiwan, but has not yet moved forward with delivery and even acknowledged that he's discussed the sale with Xi.
An explosion at a fireworks plant in a central Chinese province killed at least 26 people and injured 61 others, state media reported Tuesday, prompting the halting of all firework manufacturing near the site.
The FBI said it's illegal to photograph or sketch defense installations without approval.
A humanoid robot that won a half-marathon race for robots in Beijing ran faster than the human world record in a show of China's technological leaps.
President Trump on Saturday threatened to impose a 100% tariff on goods imported from Canada if they went ahead with a China trade deal, intensifying a feud with Prime Minister Carney, a rising voice in the pushback to Trump's new world order.