Obama hits the campaign trail for Biden in Pennsylvania

Former president Barack Obama is campaigning for Democratic presidential nominee Joe Biden on Oct. 21 in swing state Pennsylvania. Here’s what it means for the Biden campaign. Read more: https://wapo.st/2FRwCes. Subscribe to The Washington Post on YouTube: https://wapo.st/2QOdcqK Follow us: Twitter:   / washingtonpost   Instagram:   / washingtonpost   Facebook:   / washingtonpost