Why polls don’t tell us anything

Here are three headlines today, all purporting to have taken the political temperature of the nation’s swing states.

  • NPR: McCain Advancing In Swing States
  • Sacramento Bee: Obama leads McCain slightly in swing states
  • TopNews: Who is in the lead in Swing States?\

    Update 4:47 p.m. – NPR has shifted its story to “Why NPR And ABC Presidential Polls Contradict” and changed the original headline to “NPR Poll: Obama, McCain Even In Swing States.”

    Good question