3 states would work best. 1 NorCal which would be heavily blue. SoCal which would lean blueish-purple which Orange County and SD. Then you can carve out a Centr

3 states would work best. 1 NorCal which would be heavily blue. SoCal which would lean blueish-purple which Orange County and SD. Then you can carve out a Central Valley state which would be red. In effect we'd be adding 2 new senators for central/southern California, and it would be 1 red and 1 blue.