Mike Waltz has been in the spotlight since he created a group chat on the messaging app Signal to discuss sensitive information about a US strike on Houthi rebels in Yemen, and accidentally invited a journalist to join it.

Mike Waltz, who faced calls to resign over the Signal chat scandal, has sparked new scrutiny with his reported use of Gmail for official work.

Donald Trump is said to be privately furious at National Security Advisor Mike Waltz for adding a journalist to a top secret group chat about US military action