Nate himself has explicitly addressed that complaint as a huge mistake that Nassim continues to make and refuses to admit: https://twitter.com/NateSilver538/status/1114160511208259584

"p.s. You continue to cite a paper in which you critique our now-cast (a deliberately volatile hypothetical of what would happen in an election held today) and mistake it for our forecast but because you're such a stubborn idiot you won't admit to this very basic mistake."