The charts above reflect the results of the latest Economist / YouGov Poll -- done between October 11th and 13th of a national sample of 1,500 registered voters, with a 4 point margin of error.
It shows Joe Biden maintaining a 9-point lead over Donald Trump. That lead has been very steady in this poll for weeks now. The second chart shows why. The voters have made up their minds. They know who they're going to vote for, and the surge of early voting shows they are ready to do it!
There's still one debate scheduled for near the end of October, but I think it's pointless. There are very few voters undecided or could change their minds at this point.
