No clear dividing line a la Mason Dixon.
Division is sea of rural vs islands of urban. Liberate Texas and it still has Leftist dominance by Dallas, Austin, Fort Worth, etc. Georgia is struggling against the Leftists of Atlanta.
Don’t go lumping Fort Worth in with Dallas nor Austin.
Arizona struggles against the liberal university cities of Phoenix and Tucson. Oh yeah, throw in the liberal nut jobs fleeing the chaos they created in California.