Reply #41: As the quite useful Useful Idiot says [View All]

[Gman]

the Bradley Effect is a very likely explanation. But also, the polls are national that produce a blending. National polls are not very useful since the election is not national, but a vote of the electoral college. I've yet to see any individual state polls. Furthermore relying on national polling information in May rather than state by state results closer to the election does nothing.