The first presidential debate between President Trump and Joe Biden featured a chaotic series of bitter exchanges and name-calling, with the president repeatedly speaking over his Democratic rival and the moderator struggling to maintain control of the 90-minute affair. "Will you shut up, man?" an exasperated Biden said in a comment that was emblematic of the tumultuous nature of the debate, which was held in Cleveland, Ohio. "It's hard to get any word in with this clown." The president leveled barrages of unfounded accusations against his Democratic rival and his family, invoking his son Hunter Biden's work in Ukraine and bringing up the younger Biden's history of drug abuse. Mr. Trump declined to condemn white supremacist groups and defended his response to the coronavirus pandemic that has claimed more than 200,000 American lives, trying to portray Biden as a socialist who isn't equipped to occupy the Oval Office. "Did you use the word smart?" the president asked Biden at one point. "You graduated either the lowest or almost the lowest in your class. Don't ever use the word smart with me, Joe." Biden, for his part, tried to direct his answers to the audience watching at home. He called Mr. Trump "the worst president America has ever had," blaming him for bungling the response to the pandemic and fueling racial divisions amid recent protests against police brutality. #PresidentialDebate #2020Election #2020Debates #DonaldTrump #JoeBiden CBSN is CBS News’ 24/7 digital streaming news service featuring live, anchored coverage available for free across all platforms. Launched in November 2014, the service is a premier destination for breaking news and original storytelling from the deep bench of CBS News correspondents and reporters. CBSN features the top stories of the day as well as deep dives into key issues facing the nation and the world. CBSN has also expanded to launch local news streaming services in major markets across the country. CBSN is currently available on CBSNews.com and the CBS News app across more than 20 platforms, as well as the CBS All Access subscription service. Subscribe to the CBS News YouTube channel: null Watch CBSN live: http://cbsn.ws/1PlLpZ7c Download the CBS News app: http://cbsn.ws/1Xb1WC8 Follow CBS News on Instagram: https://www.instagram.com/cbsnews/ Like CBS News on Facebook: http://facebook.com/cbsnews Follow CBS News on Twitter: http://twitter.com/cbsnews Subscribe to our newsletters: http://cbsn.ws/1RqHw7T Get new episodes of shows you love across devices the next day, stream CBSN and local news live, and watch full seasons of CBS fan favorites like Star Trek Discovery anytime, anywhere with CBS All Access. Try it free: http://bit.ly/1OQA29B