both of your suggestions have WAY more experience than Sarah Palin... plus they are already national figures... having run for president. I think you've got the reach down... WAY, WAY deeper into the barrel to find someone. Who is the mayor of Holcomb, Kansas?
Because he's worked at a national level. Has traveled around the world as an agent of the U.S. goverment and because until 18 months ago Palin was the mayor of a town of 9,000 people... Obama's State Senate district had more than ten times that many people... and he served them for 12 years.
Actually, Biden was born in Scranton, and still gets a lot of positive vibes from the community there. I think he probably puts PA in the bag for Obama, and makes a lot of folks in OH feel much more comfortable voting for him.