With just weeks to go until the US election, canvassers are knocking on doors, campaigners are buying up television spots, and the candidates are criss-crossing swing states. Meanwhile, Vinod Khosla—a high-profile Silicon Valley veteran, tech billionaire, and US immigrant—has been taking to X to try to change the mind of the most high-profile Trump supporter of all: Elon Musk. A series of heated exchanges between the two men has devolved into immigration, the tech industry, AI, climate change an...