National polls need to weighted to reflect Electoral College votes and most if
not all aren’t. Thus the results reflect only a random sample of the general public.
Clinton is so far ahead of her opponents that she’ll coast into the democratnomination
without any real competition. The GOP will be much closer until at least the Mar. 1,
round of primaries. Then the GOP field will begin to narrow rapidly,
JMO.
There are polls that use all adults samples; there are polls that use regstered voters samples; and there are polls that use likely voter samples.