US stock futures fall as Trump’s tariffs threaten a dangerous trade war

US stock futures slid Tuesday after President Donald Trump made good on his threat to levy hefty tariffs on Canada and Mexico. Dow futures dropped by around 150 points in premarket trading, and futures tied to the S&P 500 and Nasdaq 100 were both around 0.7% lower.

​ US stock futures slid Tuesday after President Donald Trump made good on his threat to levy hefty tariffs on Canada and Mexico. Dow futures dropped by around 150 points in premarket trading, and futures tied to the S&P 500 and Nasdaq 100 were both around 0.7% lower. Read More Breaking News, Latest News and Videos | CNN