Trump also threatened blanket tariffs of 15% or 20% on most trade partners, and said he will soon announce new tariffs on the EU.

U.S. and European stock futures dipped in Asia on Friday after President Donald Trump stepped up tariff threats against Europe and Canada, restraining a broad rally in regional share markets. The dollar gained on the euro and the Canadian currency as Trump issued a letter late on Thursday that a 35% tariff rate on all imports from Canada would apply from August 1,

Canada is one of the United States' top trading partners, with more than $410 billion of goods crossing into the country last year.

President Trump this week has been firing off letters to global leaders that threaten new, high tariff rates and also announcing them via social media. Here's what has happened so far.