If he were to look really closely, he’d see that in fact Trump is likely leading all these polls, and certainly all the “swing state” polls. As a reminder, my analysis of June vs. November polling is here: http://www.freerepublic.com/focus/f-news/3440835/posts
and shows massive underestimation of the GOP vote going back to 1952. This is not a small amount: the average UNDERCOUNT of the GOP was 22, the average error in the Dem direction was 13 (the polls were almost always off-—about three times they were close to the June poll in November).
So then, there is a history of the early polls being distorted, to try to show that the Democrat is more popular than he really is.
Then the polls get tighter as we get closer to election day.