Dow futures have dropped by 200 points, with the S&P 500 likely to retreat from its record high as President Trump intensifies his trade battles.

Key points include:

• Trump's latest threats include a 35% tariff on Canadian imports during ongoing trade discussions.
• Wall Street's response reflects the uncertainty stemming from these trade policies.
• Live updates and insights from CNBC and other leading news sources highlight market reactions.

Here's the full scoop.