Bets are pouring in for who will be the first member of President Donald Trump's Cabinet to leave and, after the Signal app controversy, there is a clear favorite. Defense Secretary Pete Hegseth tops the list after it was revealed he posted top secret plans about the Yemen bombing in a Signal messaging app group that had a reporter from The Atlantic in it. Secretary of State Marco Rubio, who was also part of the group chat, is in second place, also moving up the charts rapidly.