Joe Biden formally clinched the Democratic presidential nomination, setting him up for a bruising challenge to President Donald Trump that will play out against the unprecedented backdrop of a pandemic, economic collapse and civil unrest. (June 5) Subscribe for more Breaking News: smarturl.it/AssociatedPress Website: apnews.com Twitter: twitter.com/AP Facebook: facebook.com/APNews Google+: plus.google.com/115892241801867723374 Instagram: www.instagram.com/APNews/ You can license this story through AP Archive: www.aparchive.com/metadata/youtube/3f77cb65f2d44390883cc2553928decb