Herbert Hoover lost by "only" 17 points in a somewhat less partisan epoch than we have today (although the 1930s were decently partisan). https://twitter.com/peterdaou/status/1259109700282482688

Also, worth remembering the uncertainty runs in both directions. If Biden leads by ~6 points now, that could easily turn into a 1-point popular vote "win" (= likely Trump Electoral College victory) or a 2-point loss. But it could also turn into a 12-point Biden win, or something.