In the 21 previous presidential elections since 1936, there have only been five challengers who led at this time. Of those five, only one (Bill Clinton in 1992) was ahead by more than 5 points. None of those five were earning more than 48% of the vote in the polls.

In other words, Biden is the first challenger to be above 50% at this late juncture in the campaign.

This also continues to mark a massive difference with the 2016 campaign. While Hillary Clinton was ahead of Trump by as high as 7 points in October 2016, she never came anywhere close to approaching 50% of the vote. Trump merely had to win the lionshare of the undecided or third party voters (who would bolt their candidate) to earn a victory in 2016.

Even if every undecided or current third party voter went to Trump now, he’d still be down about 5 to 6 points nationally. That’s never been the case with an incumbent since 1936 at this point.