I’d move the US to work more like the EU. Conservatives could move to conservative areas and liberals could move to liberal areas with more power to pass things they want to see in their area. Some states would be able to address climate change and handle immigration in any way they want. Others could focus on safety, firearms, low taxes and personal freedoms. Each state would be more responsible for balancing its own budget and planning for emergencies. Without FEMA etc if a hurricane strike Florida they best have had their emergency fund ready and or get help from trading partners otherwise your out of luck. It’s like a modern HOA living in one gets you better roads, amenities etc if they mismanaged it then taxes go up people leave and they redo their books to incentivize the next generation back. America would become more nomadic as people try to strike the best deal every few decades while some political die hards would stick to a state for certain reasons maybe abortion laws or being in an unregulated industry local to that specific state.