By: Vanessa Balintec, Zoe Law, Stephen Farrell, Sharique Nasim, Rupam Jain, Joe Bavier, Mina Kim, Seham Eloraby, Mark Porter
President Joe Biden's address in Chicago kicked off a four-day event fueled by enthusiasm for Kamala Harris, as he urged Democrats to unite behind a candidate who could become the first woman to be elected US president.