The disagreement between Trump and Musk stems from a fierce contradiction over the "Big and Beautiful" tax reform bill. Trump is pushing the bill to cut spending and increase defense spending, but Musk criticizes it for "increasing the deficit" and "robbing the poor to pay the rich," publicly calling the bill "disgusting." The trigger was the policy in the bill to revoke the mandate for electric vehicles, with Musk accusing Trump of "betrayal," while Trump countered by accusing Musk of "ingratitude," threatening to terminate his company's government subsidies and contracts. The two engaged in a social media spat on June 5, with Musk openly supporting Trump's impeachment and stating that Trump would not have won without his help. The conflict led to a big dump of Tesla's stock price, which fell 14.26% in a single day, wiping out over $150 billion in market capitalization, and SpaceX also facing a crisis with the retirement of the "Dragon" spacecraft. This rift exposed the ideological conflict between technological elites and traditional populist forces within the American conservative movement.