MSNBC's video: You would be worried if your grandpa was acting like this : Obama questioned Trump s fitness in AZ

Former President Barack Obama stumped for the Harris-Walz campaign in Tucson, Arizona to rally voters. He encouraged them to vote early or return their mail ballot for Vice President Harris and Democrats up and down the ballot. He also questioned Trump's competence during the campaign event. “You would be worried if your grandpa was acting like this,” he said. » Subscribe to MSNBC: http://on.msnbc.com/SubscribeTomsnbc About: MSNBC is the premier destination for in-depth analysis of daily headlines, insightful political commentary and informed perspectives. Reaching more than 95 million households worldwide, MSNBC offers a full schedule of live news coverage, political opinions and award-winning documentary programming -- 24 hours a day, 7 days a week. Connect with MSNBC Online Visit msnbc.com: http://on.msnbc.com/Readmsnbc Subscribe to MSNBC Newsletter: MSNBC.com/NewslettersYouTube Find MSNBC on Facebook: http://on.msnbc.com/Likemsnbc Follow MSNBC on Twitter: http://on.msnbc.com/Followmsnbc Follow MSNBC on Instagram: http://on.msnbc.com/Instamsnbc LIVE: Former President Barack Obama campaigns for VP Harris in Arizona