Rasmussen sent a notice last week stating he was slightly increasing dem affiliations and dropping Repub for no reason except a guess just like Gallup did but with no verbal notice .Rasmussen weights by party based on a very large poll of voters self identification and Gallup doesn't weight by party at all.
Read the WIZBANG website analysis of the Gallup raw data vs the Poll results.
There is a party affliation in the mix and they just won’t admit it.