Duckworth was participating in the certification of the 2021 United States Electoral College vote count when Trump supporters stormed the U.S. Capitol. In the wake of the attack, Duckworth called Trump "a threat to our nation" and called for his immediate removal from office through the invocation of the Twenty-fifth Amendment to the United States Constitution or impeachment. Two days later, on January 8, she also called for the resignation of Representative Mary Miller, who had quoted Adolf Hitler during a speech on January 5.