PPP strikes out again

[Dgov]

So?  There were weeks when Ras was vastly different from the rest of the other main pollsters.  It doesn't disqualify them any more than that does.

To put it simply, different pollsters have different methods for polling.  They are all imperfect, and can respond differently to different swings in the national electorate.  Add that on top of just regular old random variation and you can get results like this from time to time.