For all the insults that Mr. Musk and Mr. Trump traded on Thursday, don’t be surprised if they make up again days from now. In the meantime, they both benefit.

It would have been another banner day for Silicon Valley’s blossoming alliance with Washington — if only President Donald Trump and Elon Musk hadn’t been attacking each other online. While the two men traded barbs on their respective social networks,

Donald Trump's former allies say the political battlefield is littered with the scorched remains of those who have had a falling-out with him.