Call it foreshadowing. President Donald Trump left Mike Waltz stranded on the tarmac after Air Force One headed for Michigan on Tuesday, just two days before he was fired as national security adviser.

Mike Waltz, who played a central role in the Signal-gate, is now out as Trump's National Security Advisor, but why did he decide to resign?

President Donald Trump says he is nominating national security adviser Mike Waltz as United Nations ambassador while Secretary of State Marco Rubio would take over Waltz’s duties on an interim role.