The public rift between Elon Musk and Donald Trump may have ended one of the most high-profile power alliances in recent American politics, but insiders say it could signal something much bigger: Silicon Valley is no longer just playing along with politics—it’s rewriting the rules. Over the past week, Trump confirmed the end of his relationship with the billionaire tech mogul, telling media outlets: “I don’t care for Elon anymore. The relationship is over.” The fallout followed a series of sharp criticisms from Musk over Trump-backed legislation and veiled accusations posted on X (formerly Twitter), some of which were later deleted. What was once viewed as a strategic alliance—Musk had met with Trump during his presidency and supported various economic...