Joe Biden's incomparable presidential odyssey

When Joe Biden accepts the Democratic Party's presidential nomination tonight, it will mark a major milestone in a journey he's been on for more than three decades.Biden first sought his party's nomination for the 1988 race, but his candidacy didn't even survive into the election year: He withdrew in September 1987 after reports he had plagiarized portions of a speech by British politician Neil Kinnock. (He ended up having surgery for a brain aneurism in early 1988 and wouldn't have been able to