In his unpredictable push to upend the global trading system, President Donald Trump has changed deadlines, blown up deals, and delivered White House speeches and decrees threatening sweeping tariffs - only to repeatedly walk them back and claim victory while throwing markets into chaos.
In the last week, Trump has sent letters to 22 countries warning of incoming tariff rates, according to his social media posts, including 50 percent taxes on Brazilian imports and 35 percent on Canadian goods.
