Adjudication through the Supreme Court and/or Constitutional Amendment to clarify.
That's the eventual path we must take or we have failed.
It's unfortunate in the extreme that Cruz will be the test case. It ends his pursuit this cycle but does not necessarily preclude his success in a future cycle.
It should have been conclusively decided When President Pierce died and Chester Arthur took over.
http://www.answers.com/Q/Was_president_Chester_A_Arthur_born_in_Canada
It may end his run. We’ll see. But it should have been resolved the moment it ever became an issue, certainly with the Obama mess.