Katie Couric, in a segment to air tonight, asks Palin about her joke that she's been listening to Joe Biden's speeches since second grade, and whether that isn't an odd thing to say given her own running mate's age:

Oh no, it's nothing negative at all. He's got a lot of experience and just stating the fact there, that we've been hearing his speeches for all these years. So he's got a tremendous amount of experience and, you know, I'm the new energy, the new face, the new ideas and he's got the experience based on many many years in the Senate and voters are gonna have a choice there of what it is that they want in these next four years.