Stephen Colbert on Those "Illusive, Mysterious, Undecided Voters"

In the UK, campaign season lasts for 6 or 7 weeks and then they vote. Our campaigns, on the other hand, start two years before the election, and by this time voters have been bombarded with messages from the campaigns.

Most people are locked in for either Obama or Romney, but then there are those undecideds -- the dwindling number who remain on the fence.

Just who are these odd creatures who haven't made up their minds yet? Stephen Colbert investigates. Watch!