Billionaire investor Bill Ackman publicly urged President Trump to reconsider aggressive tariff measures, warning they risk sparking a global trade war and severe economic damage. Ackman argued that imposing “massive and disproportionate tariffs” on both allies and adversaries could erode international trust in the U.S., leading to halted investments, reduced consumer spending, and widespread layoffs. He predicted a “self-inflicted economic nuclear winter” if the administration doesn’t pause to fix what he called an unfair tariff system.

The hedge fund manager called for a of reciprocal tariff actions to allow negotiations. He emphasized that a truce could still prevent harm to millions of Americans, stating, “There remains an opportunity for a truce before millions are adversely affected”.

The administration dismissed rumors of a tariff pause as on April 7, rejecting Ackman’s plea. Trump has defended tariffs as necessary to revive U.S. manufacturing and address trade deficits, arguing, “Sometimes you have to take medicine”.

Recent tariff threats caused market volatility, with the S&P 500 dipping 0.23% and China retaliating with its own tariffs. The European Commission proposed a to avoid escalation, while Vietnam faces pressure to reduce tariffs on U.S. goods.

Critics like Ackman warn that Trump’s approach risks decades of globalization progress and could destabilize markets long-term. Despite this, Ackman remains invested in U.S. companies, including and , affirming he’s “proudly long America”. The Rubin Report highlighted these tensions, with commentators debating whether Trump’s strategy will pressure China or backfire economically.

As of April 11, there’s no indication Trump has altered his tariff plans, setting the stage for continued economic uncertainty.