FiveThirtyEight used probabilistic systems:
https://projects.fivethirtyeight.com/20 ... id=rrpromoIf you hover over the states in the snake trail you can see their projections state by state - these were off especially in Michigan and Wisconsin. Pennsylvania is currently the reverse of their projections - votes are still pending there.
The National polls should be compared against total voters - we'll see what that shows us once all votes are counted.
With fivethirtyeight's graph showcasing Trumps odds at 1 in 10, not as good as 2016 but still up there, people are having a hard time with this coming down to the wire yet again. I get that they can say it's a probabilistic system and that this still falls in line with their projections but this falls in the much less probable area of their projections - again. That's annoying.