What does this map depict?

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After finishing this map, I discovered by sheer chance that its content is even way more interesting than it initially seems, almost a bit eerie...

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Hint: It has to do with general and primary election results.

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Another hint: Clinton holds the key to the solution.

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Maybe it's too difficult to guess; maybe you just don't care.
Anyway, here's the answer:

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All green states have always voted for the Clintons, both in their three general elections (barring Puerto Rico, of course) and in their four primaries.

The red states have never voted for either Clinton, not even in 1996, as Alaska and Utah didn't hold any presidential primaries that year.

But it'll get even more interesting. Or shall I say eerier?

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In 1812, New York and New Jersey both also voted for DeWitt Clinton.



And it's not over yet:

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Four years earlier, George Clinton didn't manage to win any state, but he received six electoral votes, all of which, you guessed it, came from New York.

[Alben Barkley]

And they said Hillary was carpetbagging when she moved to New York!