“Vermont is already RED, as in communist. That is one reason which I think conservatives should be referred to as Blue and Liberals as Red—it’s more consistent that way.”
It used to be True Blue for Republicans and Red for democrats, but there were jokes about Red being appropriate for democrats and the media apparently got together, probably at the behest of democrats, and switched True Blue to the democrats and Red to the Republicans.
The other thing is that RED is the color of anger. Blue tends to denote both sadness and peace. So, it fits with the MSM narrative that conservative states are filled with angry, white people.