Left Coast Rising
The states, Justice Louis Brandeis famously pointed out, are the laboratories of democracy. And it's still true. For example, one reason we knew or should have known that Obamacare was workable was the post-2006 success of Romneycare in Massachusetts. More recently, Kansas went all-in on supply-side economics, slashing taxes on the affluent in the belief that this would spark a huge boom; the boom didn't happen, but the budget deficit exploded, offering an object lesson to those willing to learn from experience.