With his tariff plan in tatters, Trump vows ‘to do absolutely terrible things to foreign countries … in a much more powerful and obnoxious way’ after the Supreme Court ruled his ‘Liberation Day’ tariffs illegal. The president’s chaotic response includes flipping between 10% and 15% tariff rates, sparking global trade partner backlash. Foreign allies face uncertainty as deals once deemed stable now risk escalation, with the U.K.’s former central bank economist calling the perversity of the situation ‘unprecedented.’

Markets reeled Monday as the S&P 500 plunged 1.04%, driven by fears of tariff-driven inflation and recession risks. Software stocks crashed 3.82%, with IBM down 13.15% amid Citrini Research’s AI doomsday scenario. Analysts warn that sustained equity declines could shave 0.5pp off 2026 GDP growth, while tariff-driven consumer price increases might add 0.5pp to core PCE inflation.

Trump’s legal justification for new tariffs remains shaky. Section 122 of the 1974 Trade Act and Section 232’s national security provisions lack factual basis, while Section 301’s unlimited tariffs could trigger prolonged trade wars. The president’s social media threats to ‘play games’ with allies highlight escalating geopolitical tensions, as Etihad Airways CEO likened policy uncertainty to warfare.

Economic costs mount as Goldman Sachs estimates a 5pp tariff hike could reduce 2026 GDP by 0.4pp. With Bitcoin sliding to $63K and European indices in the red, investors face a perfect storm of regulatory chaos, market volatility, and policy unpredictability.