Biden with just a roughly 5 point lead.



]https://www.investors.com/politics/ibd-tipp-presidential-election-tracking-poll-2020/

Is there any historical evidence that demonstrates that polling numbers become "burned in" at a certain point during an election cycle? I ask since we are now only a month away from counting the votes if what we are seeing in the polls now are pretty much what they will be a month from now.