He is not a strategic asset for the U.S. He isn’t taken down like Jack Ma because the U.S. is a different system than China. SpaceX would not collapse if Musk were replaced as CEO. Same for the other companies.
SpaceX would likely do fine, Tesla too, but its stock would get a major correction, Twitter might actually recover some losses without Musk, X.ai might go bust, but that company has no importance as of now.