President Donald Trump’s long-threatened tariffs have gone into effect, kicking off a trade war with America’s neighbors.

Yahoo Finance will chronicle the latest news and updates on Trump's tariffs — from the threats to the eventual policy.

Tariffs are a central part of Trump's economic plans. He promised to introduce import duties against some of America's main ...

China announces it will impose additional tariffs of up to 15% on imports of key US farm products, including chicken, pork, soy and beef ...

Prime Minister Justin Trudeau is headed back to Ottawa after ending his London visit with an audience with King Charles.

Prime Minister Justin Trudeau attended a European defence summit in London focused on defending Ukraine and the continent ...