Undeterred by a panicked stock market, President Donald Trump threatened additional tariffs on China on Monday, raising fresh concerns that his drive to rebalance the global economy could intensify a financially destructive trade war.

Stocks hadn’t fallen this far this fast since the early days of the coronavirus pandemic. A 9.1 percent drop in the S&P 500 is the steepest weekly decline since March 2020.

President Trump has maintained his confidence in his economic plan, despite a plummeting stock market at home and economic uncertainty abroad. NBC’s Yamiche Alcindor, CNBC senior analyst and commentator Ron Insana,