That one-man gaffe-machine, Joe Biden, never fails: "coming from the guy who President Obama tasked with implementing the stimulus plan: when reporters asked the VP to explain how the White House even came up with the 600,000 number, he asked for a pass, saying a question like that is "above his pay grade" and, "I'm sorry, I'm not an economist."

And then thinking a humongous multi-billion dollar train tunnel near his district was a car tunnel.

http://www.foxnews.com/story/0,2933,525673,00.html

http://www.foxnews.com/politics/2009/06/09/biden-mistakenly-claims-hudson-tunnel-accomodate-cars/