More meaningless national polls. State polling in battlegrounds like PA, FL, OH and MI are more meaningful as indicators about the state of the race.
What you said, plus registered voters were polled, and not likely voters.
There's another factor. There are sub-populations that overwhelming support Mr. Trump and will will get out and vote. No general poll will catch how they skew the vote. Coal miners and the military are two such examples.
Yup, it’s the EVs that matter.