LA Times poll thread

[ATFFL]

The two are NOT mutually exclusive.  You do not throw out peopel if you are close to a reasonable split in party ID, say a 5% Dem advantage.  Might be a bit off, but not so far teh poll needs tweaking.

Now, when assembling a representative sample a 10% or more Dem advantage is so far out of line as to rule out a true representative sample.  A 14% advantage is downright indefensible.  At that point you have clearly oversampled one side and should adjust your numbers for it, or throw out the poll as garbage.

If every other piece of methodology is good, a slight bias one way or the other will not make a huge difference.  If your difference is too big, the rest cannot compensate for it.

[ATFFL]

In part because the SUSA poll used voter self identification, there is no registry to compare that to.  Survey USA may have a grievous error, or it may have found a trend for FL voters to self identify as Reps.  More polling is needed to check this, which is one of the very first thing Vorlon says.