Stocks Slump as Trump Tariffs Take Effect

The S&P 500 added to recent losses in early trading. German automakers, many of which have plants in Mexico that make vehicles that are sold in the United States, were especially hard hit.

Biden Aides Warned Putin as Russia’s Shadow War Threatened Air Disaster

The White House scrambled to get a message to President Vladimir V. Putin of Russia last year after U.S. intelligence agencies said a Russian military unit was preparing to send explosive packages on cargo planes.