Smith was participating in the certification of the 2021 United States Electoral College vote count on January 6, 2021, when Trump supporters stormed the United States Capitol. She called the participants in the attack "seditionists" and blamed Trump for inciting the attack. When the Capitol was secure and the Congress returned to session, Smith supported the certification of the count. In response to the insurrection, she called for Trump's immediate removal from office through the invocation of the Twenty-fifth Amendment to the United States Constitution and impeachment, saying that the president needed to be held accountable for the attack and that "he is dangerous to our democracy and to public safety." She said that Representatives Michelle Fischbach and Jim Hagedorn, who objected to certifying the election, "were complicit in pushing for the president's big lie", and also called on Senators Ted Cruz and Josh Hawley to resign for objecting to the certification of the election and spreading falsehoods about election integrity.