US stock futures fell late Thursday after President Trump threatened Canada with a 35% tariff on its imports to the US and floated higher blanket levies. Trump on Truth Social posted a letter to Canadian Prime Minister Mark Carney,

US stock market today opened slightly lower as Dow, S&P 500, and Nasdaq futures paused after a powerful tech rally led by Nvidia, which just hit a historic $4 trillion market value. Meanwhile, President Trumps new tariff threats—including a proposed 50% import tax on Brazil and extra tariffs on BRICS nations—are now in focus.