Federal judge orders the Trump administration to preserve messages from a Signal chat discussing military plans, following significant leaks to a journalist.
Bipartisan senators demand an investigation into the signal chat leak revealing sensitive military plans discussed by Trump's national security officials.
U.S. intelligence officials, including Tulsi Gabbard and John Ratcliffe, testify before Congress about security threats and leaked military plans discussed in a Signal chat.
Donald Trump reacts to claims that The Atlantic's editor was included in a military plans chat about strikes in Yemen, denying any knowledge of the situation.