I was surprised to learn a new USC poll showed Donald Trump leading by 7 points today. I decided to look up the way that particular poll is calculated:
http://96.127.53.23/election/
Apparently this poll surveys 7% of the MEMBERS of a 3000 person panel (same panel every day) to see what their political views are that day. It comes out every morning and reports its results. It does not pick random members of likely voters nor of registered voters. It only surveys from the same group of people every single day.
What a BS poll. It will probably be big news today though because the MSM wants this to be a close race.