National Security Adviser Michael Waltz attends a meeting in the Oval Office of the White House in Washington, DC, on April 7, 2025. Reporter President Donald Trump is replacing his National Security Adviser,

The national security adviser infamously added The Atlantic's Jeffrey Goldberg to a Signal group chat discussing Yemen attack plans.

But President Donald Trump and his advisers were loath to take a political hit by firing Waltz, especially within the first 100 days of the new administration. The 100-day mark passed yesterday. Today,