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Yes he is
https://www.americanthinker.com/blog/2008/09/why_does_joe_biden_lie_about_a.html
Why does Joe Biden lie about a 'drunk driver' killing his 1st wife?
(snip) -- It is terrible to lose family members to a traffic accident. But why on earth would a United States Senator fabricate an embellishment and claim that it was a drunk driver's fault, when the record clearly indicates it was not?
Since his vice presidential nomination, Joe Biden's 2007 statement that a "guy who allegedly ... drank his lunch" and drove the truck that struck and killed his first wife and daughter has gained national media traction.
Alcohol didn't play a role in the 1972 crash, investigators found. But as recently as last week, the syndicated TV show Inside Edition aired a clip from 2001 of Biden describing the accident to an audience at the University of Delaware and saying the truck driver "stopped to drink instead of drive."
The senator's statements don't jibe with news and law enforcement reports from the time, which cleared driver Curtis C. Dunn, who died in 1999, of wrongdoing.
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Police said the station wagon "pulled from a stop sign" and was struck on the left side by the truck, "continuing approximately 150 feet, spinning around, going backwards down an embankment, and striking three trees."
He also towed his boys to campaign events, calling them "poor motherless boys".