There are two fundamentally opposed political systems operating side by side at this point. The idea of "crossing the aisle" or "bipartisanship" is impossible when the disagreement is this profound. One group wants a government whose foundational purpose is to create equal outcomes. In order to do that, that government will need complete control over all aspects of life. It's the only way it can "work". (It never will, but within the philosophy, they must have this power).

The other group wants government stripped of all but the most basic powers, with the primary political unit being the individual, limited only when absolutely necessary for social harmony.

These two philosophies cannot be reconciled.

Thinking of it as "secession" doesn't quite get at it. We need a clean divorce, with each side getting 50-50 on the assets of the prior marriage.

It'll never happen peacefully, but it's the only sustainable long-term goal.