As Canada and Mexico make plans for reciprocal tariffs on U.S. goods, Canadian Prime Minister Justin Trudeau calls President Trump's move "a very dumb thing to do."

President Trump's new tariffs will put an additional 10% on imports from China and 25% on almost all imports from Canada and Mexico. NBC News' Ryan Nobles reports the latest from Capitol Hill. New York Times chief White House correspondent Peter Baker and The Nation national affairs correspondent John Nichols join Katy Tur to discuss.

President Donald Trump launched a trade war Tuesday against America’s three biggest trading partners, drawing immediate retaliation from Mexico, Canada and China.

Retaliatory measures have been announced by America's largest trading partners following Trump's tariffs on Canada, Mexico and China

Trump originally put the tariffs on Canada and Mexico on hold for 30 days after the leaders of both countries said they would move to tighten border security.

President Donald Trump launched a trade war Tuesday against America’s three biggest trading partners, drawing immediate retaliation from Mexico, Canada and China. Read more:

President Trump's tariffs on Canada, Mexico and China took effect Tuesday, leading Canadian Prime Minister Trudeau to announce an immediate 25% levy on $30 billion worth of U.S. imports.

Canadian and Chinese officials say they were already helping reduce fentanyl smuggling. Prime Minister Justin Trudeau said fentanyl crossing the northern border is "near zero."

Beijing retaliated with tariffs on many U.S. farm exports, and Justin Trudeau said Canada would slap tariffs on $100 billion of American goods over the next 21 days.

Prime Minister Justin Trudeau of Canada warned that the Trump administration’s tariffs were leading to a trade war. Mexico’s leader vowed to impose countermeasures on Sunday.