Vice President Kamala Harris put former President Donald Trump on the defensive in their first presidential debate, provoking him over crowd sizes at his rallies and his felony convictions—a sign of how the race has been upended with her ascent to the top of the ticket.

Harris and Trump will meet for a presidential debate for the first and possibly only time in Philadelphia on Tuesday night.

Gov. Tim Walz comments on Kamala Harris's debate performance during a Tuesday night appearance on MSNBC: GOV. TIM WALZ: I don't want to speak for her but I would be there encouraging her to do it every day if she could.