Joseph R. Biden Jr. first ran for president in 1988, when his campaign was cut short after he made a series of blunders. After six terms in the Senate, he tried again in 2008 but failed to gain any traction in a contest won by Barack Obama. In the current political landscape, however, his focus on personal integrity and experience, which were also centerpieces of his previous campaigns, has proved much more compelling. Today, we chart Mr. Biden’s political journey and explore the baggage he will carry into the November election. Guest: Matt Flegenheimer, a national politics reporter for The New York Times. For more information on today’s episode, visit nytimes.com/thedaily Background reading:Mr. Biden’s political career has been marked by personal loss. Eulogies he has delivered offer an insight into how he would lead a nation grappling with death and crisis.“I’ve done some dumb things. And I’ll do dumb things again.” The former vice president’s campaign for the 1988 Democratic nomination reveals the political flaws that continue to color his public life.