This has been a huge week for Elon Musk: First, the Tesla stock rally, in reaction to a good earnings report, made him billions of dollars richer (at least on paper). Then, Musk continued his full-throated campaign for Donald Trump with a marquee appearance at Madison Square Garden, leading chants of “USA!” to adoring fans amid a rally that featured the most racially inflammatory language yet of the Republican’s campaign. See omnystudio.com/listener for privacy information.