After the Signal Leak, How Well Do You Know Your Own Group Chats?

A journalist’s inclusion in a national security discussion served as a reminder that you might not know every number in the chat — and that could be a big problem.

Trump Downplays Signal Leak, Backing Waltz and Pointing Finger at Journalist

Democrats denounced the country’s top intelligence officials for “sloppy, careless, incompetent behavior” for discussing secret military plans in a group chat.

Republicans in Congress React to Signal Chat Leak With Collective Shrug

A few G.O.P. lawmakers said they would look into the breach, but party leaders largely tempered their criticism of the Trump administration.

Hegseth Disclosed Secret War Plans in a Group Chat

The conversation among the defense secretary and other national security officials on a commercial messaging app mistakenly included the editor in chief of The Atlantic, Jeffrey Goldberg.

Michael Waltz, Trump’s National Security Adviser, Is Taking Fire From Both Sides

Mr. Waltz has worked hard to burnish his credentials among the president’s supporters, in the process dismaying his former associates while not convincing his new ones.

Trump Vowed to End the Ukraine War Before Taking Office. The War Rages On.

Donald J. Trump’s promise to broker peace between Russia and Ukraine in 24 hours, “before I even become president,” proved to be hyperbole.