With just one day to go, the race for the White House is deadlocked - both at the national level and in the all-important battleground states.
The polls are so close, within the margin of error, that either Donald Trump or Kamala Harris could actually be two or three points better off - enough to win comfortably.
There is a compelling case to make for why each may have the edge when it comes to building a coalition of voters in the right places, and then ensuring they actually turn out.
Let's start with the history-making possibility that a defeated president might be re-elected for the first time in 130 years.