[Jyotishi]

Excerpt:

After the 2000 election, the color red became associated
with the GOP, although the party has not officially
adopted it. That election night, for the first time, all
of the major broadcast networks used the same color
scheme for the electoral map: states won by Republican
nominee George W. Bush were colored red, and states won
by Democratic nominee Al Gore were colored blue. Although
the assignment of colors to political parties is
unofficial and informal, they have come to be widely
recognized by the media to represent the respective
political parties.

http://en.wikipedia.org/wiki/Republican_Party_(United_States)

[AlexW]

Thanks for your input.