Also, one reason that Rasmussen is more reliable than most polls is because of its party identification methodology. It polls party ID separately every month, with a sample of 15,000 respondents, then applies that figure to its likely voters opinion surveys. Thus it avoids the oversampling of Democrats practiced by overtly & covertly politically motivated pollsters.
BTW, GOP ID is now at the highest ever.
It also uses superior methodology for sampling cell phone users.