@Lash,
http://www.slate.com/articles/news_and_politics/history_lesson/2008/08/the_write_stuff.html
Biden's downfall began when his aides alerted him to a videotape of the British Labor Party leader Neil Kinnock, who had run unsuccessfully against Prime Minister Margaret Thatcher. The tape showed Kinnock delivering a powerful speech about his rise from humble roots. Taken by the performance, Biden adapted it for his own stump speech. Biden, after all, was the son of a car salesman, a working-class kid made good. Kinnock's material fit with the story he was trying to sell.
At first Biden would credit Kinnock when he quoted him. But at some point he failed to offer the attribution. Biden maintained that he lapsed only once—at a debate at the Iowa State Fair, on Aug. 23, when cameras recorded it—but Maureen Dowd of the New York Times reported two incidents of nonattribution, and no one kept track exactly of every time Biden used the Kinnock bit. (Click here for examples of Biden's lifting.) What is certain is that Biden didn't simply borrow the sort of boilerplate that counts as common currency in political discourse—phrases like "fighting for working families." What he borrowed was Kinnock's life.
Biden lifted Kinnock's precise turns of phrase and his sequences of ideas—a degree of plagiarism that would qualify any student for failure, if not expulsion from school. But the even greater sin was to borrow biographical facts from Kinnock that, although true about Kinnock, didn't apply to Biden. Unlike Kinnock, Biden wasn't the first person in his family history to attend college, as he asserted; nor were his ancestors coal miners, as he claimed when he used Kinnock's words. Once exposed, Biden's campaign team managed to come up with a great-grandfather who had been a mining engineer, but he hardly fit the candidate's description of one who "would come up [from the mines] after 12 hours and play football." At any rate, Biden had delivered his offending remarks with an introduction that clearly implied he had come up with them himself and that they pertained to his own life.