When you consider all of the legal avenues here, what you find is that the "natural born citizen" requirement laid out in Article II of the Constitution is unenforceable except by: (1) the voters, (2) the Electors in the Electoral College, or (3) Congress.
There is no role for a Federal court in the matter, which is why they have consistently refrained from making any decisions in these matters.
P.S. -- For an interesting bit of research on this subject, check out the disputed 1824 election and the events surrounding it. Interestingly, one of the candidates in that election -- Henry Clay of Kentucky -- did not meet the strict constitutional definition of a "natural born citizen" posted repeatedly here on FreeRepublic, but ran anyway. And from what I can tell, it wasn't even an issue among his opponents.
There are two ways to argue cases
The first and most common is to argue case law
The second was barely covered in classed and only took a paragraph of text book my father explained when he was in class in the 40s. He used the Latin term for it
(Dad graduated at top of class and clerked in the federal courts. He even called the Bush/Gore case 100% weeks before it was settled stating vp p it would be decided on. He was a genius )
We followed the Obama cases every night. I’d print out latest material and he would read and instruct
I value his opinion and will take it over yours
Since the situations of Cruz and Obama may be identicle his opinion would be too