For those confused by why this poll has such a large divergence between "Registered" and "Likely" voters (especially when the pool difference in only 900 RVs against 791 LVs), this is because the USAT/Gallup polls use a very unusual method of determining likely voters. Rather than ask whether people are likely to vote, Gallup (but not Gallup tracking) simply reweights their poll based on how likely they think people are to vote. This could be more accurate in the sense that it avoids the small number of people who may say that they are certain to vote but will actually stay home, but it is overall a largely untested--and unconventional--method.
I always thought a lot of LV screens were based on past voters?
