Warren was at the Capitol to participate in the 2021 United States Electoral College vote count when Trump supporters stormed the Capitol. She called it an "attempted coup and act of insurrection egged on by a corrupt president to overthrow our democracy", and the perpetrators "domestic terrorists." The day after the attack, Warren joined the entire Massachusetts Congressional delegation to call for Trump's immediate removal from office through the invocation of the Twenty-fifth Amendment to the United States Constitution or impeachment.