Acting Department of Homeland Security Secretary Chad Wolf was the latest Trump administration official to announce his resignation Monday, stating that he'll step down from his post at the end of the day, with Federal Emergency Management Agency Administrator Pete Gaynor taking over, presumably, until the Biden administration arrives.
Wolf didn't specifically mention the deadly riot at the United States Capitol riot last week, which prompted him to release a statement imploring President Trump to "strongly condemn the violence that took place," as a reason for his resignation. He instead referred to court rulings that found he wasn't serving his role lawfully, and therefore lacked authority to make policy decisions.
Last week, Trump withdrew Wolf's nomination to formally lead the department, a move the White House denied had anything to do with Wolf's criticism about the riots.