Election Update: Is Trump Getting A Convention Bump? FiveThirtyEight
Now is when I start paying attention to polls (well, actually, August), and FiveThirtyEight does it better than anyone. Unfortunately, this year's polls, so far, have been pretty bad, owing primarily to the rapid change in technology, but I think exacerbated by the weird year (and the high negatives of both candidates). There is always a good deal of "noise" in the polling, but not nearly the wide swings so many are taking, indicating the data is unreliable and the"margin of error" optimistic.