Tesla CEO Elon Musk escalated a public feud with Trump trade advisor Peter Navarro, according to CNBC. Musk harshly criticized Navarro in response to his claim that Tesla only assembles cars, using a series of personal insults to dismiss his credibility. White House Press Secretary Karoline Leavitt dismissed the insults. Tesla stock is down 22% in four sessions and 45% for the year, shedding over half a trillion in value.