Doug, yes I do, and I don't have to look it up.I learned it in high school.
John Nance Garner, vice president under FDR in his first term said about that office, "It aint worth a bucket of warm spit." (He actually said, "warm piss" but they couldn't print that.
Teddy Roosevelt was given that position because it was considered a dead end, and he had enemies in his own party.

The duties of the VP...be ready to take over as president if needed. Serve as referee in the senate, and to cast the tie breaking vote. That is it.
And, yes, Joe Biden knows what the constitution says.

Palin is a clueless idiolog.If she is the future of the republican party, you are in deep doo doo.