While Biden's endorsements of fellow Democrats are not surprising, they also come as he stirs speculation about his future as a possible 2020 presidential candidate. Biden, 75, has cast himself as a son of Scranton who can reach the working-class swing voters who have fled his party. He is also scheduled to visit Capitol Hill next week to speak with the Democratic Blue Collar Caucus, said Rep. Brendan Boyle (D., Pa.), the group's co-chairman.