Bill Ackman, a billionaire investor, said the United States is moving towards a self-created “nuclear winter” due to tariff promotions by US President Donald Trump.

“By raising a global economic war against the world immediately by raising massive and disproportionate tariffs on our friends and our enemies, we are undermining confidence in our country as trading partners,” Ackman endorsed on social media platforms, who endorsed Trump in the election.

Trump’s latest tariffs, Signing and taking effect On Wednesday, a 10% benchmark tax on all imported goods hit 180 countries and defeated global markets.

China faces the highest tariffs, with the Trump administration taking on 54% of its responsibilities since January. Beijing has retaliated Tariff 34% on all goods imported from the United States.

U.S. stocks restricted investors a vicious week on Friday, while Trump’s fear of a global slowdown fell by 9.08%. JP Morgan Increase the chances of US and global recession to 60% By the end of this year, it was 40%.

“Business is a game of confidence. The president is losing confidence as a global business leader,” Ackerman said.

“The consequences for our country and millions of citizens who support the president, especially low-income consumers who are already under enormous economic pressure, will be seriously negative. This is not what we voted for,” hedge fund manager said.

Trump has a chance to call for a suspension of any negotiations to resolve any “unfair” tariff transactions.

“Also, we’re heading to a self-inducing nuclear winter and we should start working on it,” he said.

In separate tweetsAckerman also took a platter at U.S. Secretary of Commerce Howard Lutnick. “When our economy collapses, he makes a profit. Choosing a business secretary with fixed income for a long-term fixed income is a bad idea,” Ackerman said, adding that it is “irreconcilable conflict of interest.”

Lutnick told CBS on Sunday that the Trump administration Reciprocal tariffs on key trading partners will remain firm Even in the face of global stock crash.

The U.S. Department of Commerce did not immediately respond to CNBC’s request for comment.