host: ann selzer here for this conversation.ou want to ask her questions about the polls and results she is talking about, 202-748-8000 for democrats. 202-748-8001 for republicans. about the mechanics of the poll, how many people do you talk to? tell us about the process. guest: we talked to a lot of people. we start with the registered voter list which is a huge proportion an almost universal list of everybody eligible to vote in iowa. then we call randomly with a few criteria. i will not go into the details. we ask people if they will definitely go to the republican caucus, probably, might not. if you say definitely or probably, we take you, we accept you as a likely caucus-goers. if you say less than that, we gather your democratic data from the list so we know your age, sacks, and county, and we talked to over 4000 people to get 700-some likely voters. we can make those 4000 people look like a cross-section of the voter list and then we extract the likely voters. if older people are more likely to caucus, they will show up i