Even in landslide Republican wins, like 1980 & 1984, you never see the Republican up by 15 points ahead of an election. Reagan won 49 states and couldn't match the margins Clinton was enjoying in 2016 or Biden today. In fact, some had Reagan losing.
We have seen this movie before. Dukasis +17. Clinton +14. Biden+ 13. Gillum +9. Coakley +14 over Scott Brown with a week to go. As the election gets closer, the polls will "magically" tighten up to preserve credibility. For example, the pollsters will claim they were accurate at the end on the 2016 race ignoring Clinton +14 and Clinton +20 in Michigan just weeks before.
I wonder why they feel the need to make the polls so lopsided? Fund raising?
Dukakis as never up by 17. One poll taken after the convention showed that and that is all. Also Trump has failed 2 leadership tests. Trump's leadership on the coronavirus and race relations have been disastrous. Trump has a record which neither Clinton or Trump had in 2016.