[GraniteStateConservative]

3) Republican supporters usually have high speed internet and more likely to have VOIP telephone which numbers are usually not listed in data bases that pollsters use.

4) More Republican supporters use only cell phones than a home phone which are also not in a pollsters data base.

Many pollsters don't use a phone number DB. They have machines that randomly generate phone numbers within an area code and exchange.

[Dane]

Many pollsters don't use a phone number DB. They have machines that randomly generate phone numbers within an area code and exchange.

And I actually had a pollster state that it takes 5 phone calls to get 1 response and with the pletora of such things as cell phones and caller ID's, the people that pollsters are most likely to reach are people with old style land line phones(I.E more likely to be democrats)

[tobyhill]

http://www.mysterypollster.com/main/2004/10/arianna_huffing.html

You're right, I was paraphrasing what I thought they were referring to a data base but it's a little different on why they don't contact cell phones or VOIP phones.