Yep. Consider Eastern California: the Sierra Nevada runs north to south creating a natural barrier. There's a small sequence of cities east of the barrier. Duri

Yep. Consider Eastern California: the Sierra Nevada runs north to south creating a natural barrier. There's a small sequence of cities east of the barrier. During the Spring and Fall campaign season, it can be literally impossible to cross that barrier: you must go a long way around or fly. The suggested algorithm would unite cities on both sides of the divide. It would be very difficult for an underfunded candidate to campaign on both sides.