How Mexico Cracked Down on Its Immigration Chief to Defuse a US Migrant Crisis

When border crossings grew out of control in 2023, the U.S. pressured Mexico to do something. Officials rebuked the immigration chief and stripped him of a key power, an investigation shows.

Greenland to Trump: Not for Sale but Let’s Talk Business

The country’s prime minister said that while Greenlanders do not want to become Americans, “the reality is we are going to work with the U.S. — yesterday, today and tomorrow.”

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.

Biden Administration Adopts Rules to Guide A.I.’s Global Spread

New rules aim to keep advanced technology out of China and to ensure that cutting-edge artificial intelligence is developed by the United States and its allies.

Biden Officials Say the Truth About Havana Syndrome Is Still Unknown

The White House contradicts a new intelligence assessment on the mysterious ailments that diplomats and spies have reported for years.

4 Takeaways From the Arguments Before the Supreme Court in the TikTok Case

The justices, who asked tough questions of both sides, showed skepticism toward arguments by lawyers for TikTok and its users.