Nate Silver of FiveThirtyEight –
Even if you knew in advance about the “blue shift” that would occur in states like Pennsylvania — and we did know in advance about it! — it’s been hard to make enough of a mental adjustment for it this week. Numbers flashing across a TV ticker have a certain magnetic power and certitude to them. It was easy to forget that Joe Biden would gain ground once mail votes were added to the tallies because such votes were overwhelmingly Democratic this year in Pennsylvania and most other states.
But just because of that blue shift — and the red shift that occurred in states where mail votes were counted first — that doesn’t mean the presidential race was all that close in the end. Joe Biden’s win was on the tighter side of the likely range of outcomes suggested by polls, but it was a thoroughly convincing one judged on its own merits.