I think nationalizing more issues also leads to more divisiveness. If you get fed up with your city government, you can move. What do you do if you get fed up w

I think nationalizing more issues also leads to more divisiveness. If you get fed up with your city government, you can move. What do you do if you get fed up with your national government? On top of that, if relatively slim majorities (55%, say) can drastically change the rules (Citizens United, ACA), then there is a loss of legitimacy in the government. This also causes divisiveness since the country becomes a nation of power (who can scrape together a majority?) and not a nation of laws.