Campaigning in Charlotte, via the AP:

"What worries me most is the McCain campaign seems to have gotten a little loose," Biden said. "John's getting a little loose. He doesn't have much of a steady hand these days. Now's the time we most need a steady hand."

The Delaware senator told the crowd the nation needs to unite to address the challenges ahead. He called Republican robocalls "scurrilous" and said ads portraying Obama as an extremist hurt the American people.

"It is corrosive to American society," Biden said. "It's awfully hard to build anything with that kind of corrosion."

Although warning of the dangers of political divisions, Biden took aim at McCain. Deriding McCain's effort to dissociate himself from President Bush, Biden accused the Arizona senator of "quacking like George W. Bush."

And after botching McCain's name, Biden joked he no longer knew his longtime Senate colleague.

"John McClain. John McClain. Excuse me, John McCain. John McCain - I don't recognize him anymore," Biden said to laughter from several hundred supporters in attendance.

As anyone who loves good movies knows, John McClaine (or McClane) took down a German terrorist group in LA back in the late '80s. He then did the same to another group of terrorists at Dulles International. (I hear he's done some more stuff since then, but not sure those exploits qualify as "good movies.") All of which means, I guess, that if one is to be confused with anyone else, you could do much worse than John "Yippee ki-yay" McClane.