China retaliates as Trump tariffs take effect, Beijing adds levies on U.S. foods, blacklists American companies; Mardi Gras 2025 security at historic level following New Year's attack.
U.S. tariffs on Mexico and Canada go into effect and levies on China raised; House Transportation subcommittee holds hearing on state of air traffic control system.
Migrants who came to the U.S. via a Biden-era online appointment app have been told to leave "immediately" in a message from the Department of Homeland Security.
