[okie01]

You've just been introduced to how a pollster adjusts his polling sample to replicate what he believes will be the actual turnout.

"Very conservative" voters are relatively difficult to poll -- as a group, they don't answer unknown phone numbers or respond to pollsters. As a consequence, unadjusted polling samples tend to under-represent them.

Moreover, the Republican primary party polling to date further suggests that "very conservative" voters are turning out in a higher proportion than expected (see Iowa).

Under these circumstances, the pollster has re-adjusted his polling sample to represent what he believes the actual turnout will be.

[jennychase]

In Iowa, you have add caucus fraud by Cruz. In SC, it will favor Rubio.

[usafa92]

Kinda like that moron who did the unskewed polls in 2012 that had everyone thinking Romney was going to win?

[GOPJ]

"Very conservative" voters are relatively difficult to poll -- as a group, they don't answer unknown phone numbers or respond to pollsters.

That's interesting... makes sense. By any chance are Bernie supporters the most likely to pick up the phone... Oh wait, they would be 'most likely' ... to only have a cell phone, right?