This is interesting to me because it directly impacts Obama's eligibility. (As has been pointed out already of course)
But I've been (silently) following the issue as it pops up in threads here and there and for me, it's remained an open question as to whether or not Obama really was/is eligible. There just didn't seem to be enough evidence to say either way, at least here on FR if not the "world" at large.
However now, it seems to me this statement you made can and probably should put the question of Obama's eligibility to rest. For two reasons:
1. Now the issue about whether or not he was born on American soil becomes moot as no one questions he was born to one US citizen. So...
2. If we can now say that there exists no prerequisite to two citizen parents to confer "natural born status", then Obama is/was eligible.
This presupposes agreement on these two points from every "birther"; a brief reading of the thread seems to indicate there are still some who insist both parents be citizens. If this is the case however, there is no way Cruz can be eligible either.
I guess I'm also saying I'm sensing a storm brewing on the horizon should Cruz elect to run in 2016.
I hope that doesn't make me a concern troll.