[ambrose]

Why is Gallup showing such a wide margin compared to other polls showing a dead-even race?

Because Gallup is a good pollster and the others are biased, poll on weekends, use bad methodology, etc., etc. ;)

[billhilly]

"Because Gallup is a good pollster and the others are biased, poll on weekends, use bad methodology, etc., etc. ;)"

Thirty years ago the big three pollsters were Lou Harris, George Gallup and Bob Teeter(Market Opinion Research)

Today anyone with a computer gets into the game.