Oh, another crappy Fox News poll. March 20-22, 2016 Fox News found Clinton up 11 over Trump. "But he wasn't the incumbent then" - I would respect that argument more if the undecided/other numbers were drastically less in this one. They aren't. 49-38 Clinton in 2016 and 49-40 Biden in this one. Says a lot people believe this one over the WaPo/ABC news one, which has little/no undecideds.
This is nonsense. You're complaining that a poll EIGHT MONTHS before the 2016 election as being off. Clinton probably would have won by a large margin if the election had been held at that time. Do you think nothing changed in those eight months?