First off, this is a national poll, which is worthless in a Presidential election due to the electoral college. State by state pols are all that matter.
Also, always look at a polls methodology, it tells you who they polled. This poll shows 466 Democrats and 341 Republicans. And the Dem leads the poll by a wide margin? Well, imagine that.
800 people is a pathetic sample size in any case.
They will be releasing the battleground states tomorrow.
-PJ