A Washington Post report says Marco Rubio warned Trump in May that U.S. intelligence showed Nvidia chief executive Jensen Huang was having an affair with a woman believed to be a Chinese spy, yet Trump kept Huang close, approved selling advanced chips to China, and denies knowing of the situation. With Trump due to meet Xi Jinping in Shenzhen in about a week, Democrats including Chuck Schumer assail his response, while China calls the allegations groundless.