It looks like a few kind words about Barack Obama must've helped Joe Biden get himself a slot on the 2008 Democratic Presidential ticket:
You got the first mainstream African-American who is articulate and bright and clean and a nice-looking guy.
"Poor Joe Biden", 2/1/07
... one way or another, Obama's running mate won't run out of things to say. No matter what, the Senator from Deleware should be able to dig around and find the right thing to say.