Update:

WASHINGTON (AP) — President Donald Trump launched a trade war Tuesday against America’s three biggest trading partners, drawing immediate retaliation from Mexico, Canada and China and sending financial markets into a tailspin as the U.S. faced the threat of rekindled inflation and paralyzing uncertainty for business.

Canada and Mexico: Trump's 25% across-the-board tariffs on its US neighbors go into effect on Tuesday, March 4, after the president ruled out another delay to implementation. Canada retaliated with a package of tariffs on $107 billion of US products, some immediate. Mexico's president said it would announce retaliatory tariffs beginning on Sunday.
China: Duties on China went into effect in early February, and China retaliated. Trump's second move doubled the rate of tariffs on Chinese imports to 20% from Tuesday. China has responded with up to 15% duties on US farm goods such as chicken and pork, to start on Monday.
European Union: Trump has threatened tariffs on the EU in a move that could bring his trade war across the Atlantic.