Speaking of 2016, 538 had Clinton at 48.5, Trump at 44.9, and Johnson at 5. Clinton finished at 48.2 but Trump at 46.1 and Johnson at 3.2. Trump got enough of that Johnson vote combined with a small move to Stein that gave him a slim win in three states. This year there isn’t a 3rd party polling at 5%. That’s why the margins are slimmer.