I do not think that job means what you think it means...

(With all apologies to Vizzini and Inigo Montoya)

Unlike other areas, it looks like there's no controversy that the vice presidency is evolving:

Q: Brandon Garcia wants to know, “What does the Vice President do?”

PALIN: That’s something that Piper would ask me! … [T]hey’re in charge of the U.S. Senate so if they want to they can really get in there with the senators and make a lot of good policy changes that will make life better for Brandon and his family and his classroom.

Yes, the VP is "President of the Senate," and I understand "breaking it down" in order to answer a child's question, but I can think of about a dozen different explanations that would be more accurate. It would be easy to dismiss this as another in the endless string of Palin's idiotic responses to otherwise straightforward questions, but stupidity is unfortunately the most charitable of interpretations. Palin has already gone on record with her Cheney-ian belief that the vice-president is a Constitutional wild card:

PALIN: I'm thankful the Constitution would allow a bit more authority given to the vice president if that vice president so chose to exert it in working with the Senate and making sure that we are supportive of the president's policies and making sure too that our president understands what our strengths are...

IFILL: Governor, you mentioned a moment ago the constitution might give the vice president more power than it has in the past. Do you believe as Vice President Cheney does, that the Executive Branch does not hold complete sway over the office of the vice presidency, that it it is also a member of the Legislative Branch?

PALIN: Well, our founding fathers were very wise there in allowing through the Constitution much flexibility there in the office of the vice president. And we will do what is best for the American people in tapping into that position and ushering in an agenda that is supportive and cooperative with the president's agenda in that position. Yeah, so I do agree with him that we have a lot of flexibility in there, and we'll do what we have to do to administer very appropriately the plans that are needed for this nation.

Not knowing how the office works, or not caring.

GREAT choice.