After months of oscillating speculation, followed by a long ramp up that drew out uncomfortable reassessments of his long public career, former Vice President Joe Biden has announced that he will run for president in 2020. The 76-year-old former Delaware senator immediately becomes a top contender vying for the Democratic nomination, four years after passing on a bid for the White House in the wake of his son Beau’s death. Biden is the 20th candidate to enter the Democratic primary race.