Pointless thought experiment: what if the US had three major parties? What would the name, color and mascot for that third party be? Colors are tricky, as many have negative connotations - and if there were many third parties, they might need to go to pairs of colors, patterns or flags. For a mascot, a large animal would probably be preferred, to not look weak next to the elephant and donkey. Definitely something found in the US. Preferably something distinctly American.
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