U.S. President Donald Trump, U.S. National Security Adviser Michael Waltz, U.S. Vice President J.D. Vance, and Defense Secretary Pete Hegseth, listen to a question from a reporter during a meeting in the Oval Office of the White House on March 13, 2025 in Washington, DC. (Photo by Andrew Harnik/Getty Images)
The Pentagon's top watchdog will investigate whether or not Secretary of Defense Pete Hegseth shared classified information over an unclassified messaging app.