[Denver Ditdat]

Whats the story with that, how do they determine the colors?

Incumbents are blue, challengers are red.

[Hillarys Gate Cult]

Incumbents are blue, challengers are red.

Then why was Reagan blue and Carter red on the 1980 election map? The colors alternate every election. This goes back even further than David Brinkley's "giant swimming pool" comment in 1980.