Trump threatens new tariffs as he demands Mexico release water owed under treaty

President Donald Trump erupted on Truth Social Monday, accusing Mexico of violating a decades-old water treaty and demanding the immediate release of hundreds of thousands of acre-feet of water he claims the U.S. is owed — or face a new 5% tariff. Trump insisted the alleged shortfall is harming Texas farmers and said he’s already authorized paperwork to impose penalties if Mexico doesn’t comply. It’s the latest in a string of water-related grievances Trump has lobbed at Mexico, even as the Supreme Court prepares to rule on whether he actually has the authority to unilaterally impose tariffs without Congress under the International Emergency Economic Powers Act — a decision that could upend his threats and force him to seek workarounds.

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