Why does Rasmussen use D+3 (or D+5) when his own party affiliation summary shows R+2 (or R+3, rounding up)?
You got me. I think he’s being cautious.
If you look at his polling in the past it has always reflected his party id survey. I mean why bother with a party id survey and then ignore it? Makes no sense.
For example in 2008 his party id survey had D+6 and that’s what his sample was based on, D+6.
http://www.rasmussenreports.com/public_content/archive/mood_of_america_archive/partisan_trends/summary_of_party_affiliation
It’s weird.