Two of President Donald Trump's richest supporters have broken with him over his tariff hikes.
Billionaire hedge fund manager Bill Ackman, who endorsed Trump last summer, warned of an "economic nuclear winter" if Trump doesn't immediately pause his sweeping tariffs.
And Elon Musk, the billionaire CEO of Tesla who is an adviser to Trump and leading the Trump administration's efforts to downsize the government as head of the Department of Government Efficiency, has also spoken out against the tariff policies.