Slate; 2008: Why Biden’s plagiarism shouldn’t be forgotten.
. . . "But Biden’s exit from the 1988 race is worth recalling in detail, because his transgressions far exceeded Obama’s own relatively innocent lifting of rhetorical set pieces from his friend Deval Patrick, which occasioned a brief flap last February. Biden’s misdeeds encompassed numerous self-aggrandizing thefts, misstatements, and exaggerations that seemed to point to a serious character defect. In some ways, the 1988 campaign—in which scandal forced not just Biden but also Gary Hart from the race—marked a watershed in the absurd gotcha politics that have since marred our politics and punditry. But unlike Hart’s plight, Biden’s can’t be blamed on an overly intrusive or hectoring press corps. The press was right to dig into this one.." . . .
From Snopes: Then-U.S. Sen. Joe Biden withdrew from the 1988 presidential race after admitting to plagiarism and exaggeration of his academic record.
. . .The announcement came 10 days after the New York Times‘ Maureen Dowd reported that Biden had “lifted” parts of a speech by British Labor Party leader Neil Kinnock, “with phrases, gestures and lyrical Welsh syntax intact,” for use in a 23 August 1987 debate at the Iowa State Fair . . .
"A September 17, 1987 broadcast of the PBS NewsHour discusses how Joe Biden’s 1988 presidential bid was derailed by charges of plagiarism."