Biden’s lead, of course, is the steadiest of all time. His lead has never fallen to just a point or anywhere close. It’s been consistently at or right around 6 points, as it was this week. If you were to create a 95% confidence interval around the individual 2016 and 2020 polls, the 2016 race was about 1.5 times as volatile up to this point.

But it’s not just the margin that is important to examine. Look at the vote percentages.

The reason Biden’s lead is so wide compared to Clinton’s is that he’s running a little more than 5 points ahead of where Clinton was in terms of vote percentage. Biden is at slightly greater than 48%, while Clinton was a little less than 43%.

Even when Clinton’s lead widened in June, she never got to 48% in the polls. She had to pick up a lot more late-deciding voters for her lead to feel secure than Biden will likely need to.