Blue State/Red State

Blue State/Red State
Political Map of "Blue State"/"Red State"

 

Where did the "Blue State"/"Red State" nomenclature come from? I distinctly remember a time when that nomenclature wasn't used. "Red" used to be synonymous with "the left". With communism. For some reason the captains of nomenclature and rhetoric decided to flip that and call the conservative states "red" and the "liberal" statea "blue". It only began around the late 90s. Maybe by the 2000 election. It was purposely introduced into the lexicon. But why