The poll is of "adults" and was conducted over the weekend. Two things that always skew heavily in favor of the dem candidate.
Polls are most often done using adults, registered voters, and likely voters. The most accurate historically have been likely voters; voters that are registered and say that they will vote (that is why the Gallop numbers of +10 are hugh). A poll of "adults" does not even know if these are registered voters. Not surprisingly, this sampling method produces the least accurate results.
Remember: adults < registered voters < likely voters.
This is series...