Canada and Mexico vow U.S. trade retaliation, Alphabet and Amazon earnings renew focus on DeepSeek AI claims, and more news to start your day.

Stocks surrendered early gains and closed lower after the White House said President Donald Trump would impose promised tariffs on some key U.S. trading partners.

D: President Trump’s threat to impose new U.S. tariffs on imports from China, Mexico and Canada drove down stocks multiple sectors Monday, with shares of several media companies falling as investors grappled with America’s new trade wars.