Let’s take a look at the recent polling in Louisiana, pitting incumbent Republican senator David Vitter against Democrat Charlie Melancon, and play “spot the margin that comes from a poll commissioned by Melancon’s campaign”:

  1. Vitter ahead by 9.
  2. Vitter ahead by 20.
  3. Vitter ahead by 18.
  4. Vitter ahead by 1.
  5. Vitter ahead by 17.
  6. Vitter ahead by 12.

If you said, number four, you’re right!