Elon Musk vs. Peter Navarro: Their feud over Trump's tariffs explained

Musk escalated his attacks on Peter Navarro on Tuesday morning. Getty Images Elon Musk and Trump's trade advisor Peter Navarro have been locked in a public spat over tariffs. Navarro called Musk a "car assembler," and the Tesla CEO called Navarro "dumber than a sack of bricks." The White House has…