They can't when they base their information on polls like this one!
AFAIC, polls from all parties are questionable!
Let's look at 1 scenerio --
Let's find 800 people that tend to think like me and put their name and # on a call list.
Let's add 400 people to the list that don't think like me.
Let's add 200 random people to the list.
Okay, we now have a list of 1,400 people from which to ask a carefully worded question, that we will use for our poll.
Now, we will mix up the names on the lists.
Poll day we will call 1,000 people from the list. If a number is called and they are not available, go to the next person on the list.
Give the poll a 3% +/- error rate. And voila, we have what many organizations call a valid poll.
My point is Theo, 6 organizations can do the same poll in the same town and each have their poll come out in their favor!
Harder