‘What would their west coast rival party be called?’
The Bigger-n-Ya’ll Party?
Now Now, your first party name was epic. Based on that this one is so so. I know you can do much much better work than that. ;-) Challenge: do it in the form of a Haiku.
MAGA
(Something along these lines. Boneheads Idiots Gangsters Grifters & Imbeciles. the BIGGI party.)