Elon Musk blew up a near-complete bipartisan budget deal with an avalanche of tweets contending that it was too costly, luring Donald Trump into demanding that Republicans kill it. But Musk’s real reason—a story that David Dayen broke in the Prospect—was that the agreement included painstakingly negotiated limits on American tech investment in China. Had that provision passed, it would have been costly to Musk’s extensive Chinese Tesla operations and future AI plans.

Between Tuesday and Thursday, the budget deal collapsed. Trump, following Musk’s lead, threw in a new demand that the deal tackle the debt ceiling, always a politically tricky vote. But neither Democrats nor Republican fiscal hawks would give Trump that.

In the end, legislators of both parties wanted to get home for Christmas, and both houses overwhelmingly passed a simple “continuing resolution” keeping the government funded at roughly present levels through March, plus disaster relief and farm aid. Musk succeeded in stripping out the China provision.

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There will be more conflicts between the goals of President Musk and those of President Trump. Some of the slash-and-burn budget cutting that Musk is proposing—Social Security, Medicare, economic development and small business aid—will enrage Republican legislators and governors, and threaten base Republican constituents, not to mention the deep differences over unfolding China policy.