Bets- in California there is a state insurance pool for the uninsurable - waiting list is long, but then you can buy insurance. I do know that some new federal regulations regarding pre-existing conditions were being discussed, but I can't remember what, if anything, came of it. And of course there's always the option of finding work with one of those wonderful large companies that still offer decent insurance coverage to their employees and dependents.
It really is pretty absurd that a country as rich as ours can't do better than this.