The Party ID of this polling sample appears plainly mentioned on the link supplied.
From the link:
“For polling data released during the week of October 26 to November 1, 2008, the partisan weighting targets used by Rasmussen Reports will be 40.0% Democratic, 32.8% Republican, and 27.2% unaffiliated.”
People much smarter than me are saying the numbers don't work at a Dem +7 weighting. The internals look very similar to what they have been for the past month. I not trying to be a downer, either way its a close race. However, this Rass poll might not show that much movement if he just shifted his #of D's and R's.