Election Day is a week away and it seems everywhere you look, there’s a new poll on TV, online, or the radio. But they don’t all say the same thing. Host Michel Martin looks at why the polls vary, and what they tell us. She talks with Stanford University political science professor Simon Jackman.
Article source: http://www.npr.org/2012/10/30/163950603/why-do-election-polls-vary-so-much?ft=1&f=1001