In fact a good many have been one by a single electoral college vote.
The voter turnout is the striking thing. Over the past few decades, 60-65% of registered voters was typical, with very little fluctuation. This time the total looks to be closer to 80%. Of course, only about 2/3 of qualified voters registered, lowering that figure to about 50% participation. I guess 1/2 the people figure one vote does not matter and it's not worth their time.
From a point of view, I guess it's surprising that even 1/2 the people can do anything together.