http://publiushuldah.wordpress.com/2016/02/04/who-decides-whether-someone-is-qualified-for-the-office-of-president-of-the-united-states/

According to Publius Huldah, under the Constitution as written, it is Congress’ job to make the call, NOT an issue for the federal courts to decide:

By Publius Huldah
According to the original intent of our Constitution, Ted Cruz & Marco Rubio are not eligible to be President because their fathers weren’t US citizens at the times they were born. So they are not “natural born citizens”.
So! How is this handled? Who calls it?  Who makes the ruling? Do we “file a lawsuit” and let federal judges decide? “Slap your hands!”, our Framers would say. They would say, “READ THE CONSTITUTION AND SEE WHAT IS SUPPOSED TO HAPPEN!”
[Our lives would be so much simpler – and our Country so much better off – if we read & supported our Constitution.]
Read the 12th Amendment. That sets forth the procedures for e******n of President and VP. Note that E*****RS are supposed to be the ones making the se******n – not The People. [There is a reason for that.]  For an illustration of how this works, go HERE and read the subheadings,  “E*****rs” Appointed by States Were To Choose The President!  and The 12th Amendment Establishes Procedures For V****g By E*****rs.
So! Assume we followed the Constitution on this issue and we get to the part where Congress is counting the v**es as provided by 12th Amendment. And Lo! Congress discovers that the person who got the most v**es for President is NOT QUALIFIED by reason of age, or not being a natural born citizen, or not having been for at least 14 years a Resident within the United States.
Obviously, it’s Congress’ job to make the ruling – to make the call – on whether the President and VP – selected by the E*****RS – are qualified under Art. II, Sec. 1, clause 5.
So what happens if Congress finds that the person with the most v**es for President is not qualified? We look to Sec. 3 of the 20th Amendment. It tells us what happens. If the President elect has failed to qualify, then the VP elect shall act as President… Now, read the rest of that Section. We would also need to see whether Congress has made any of the authorized laws providing for such contingencies.
So, under the Constitution as written, it is Congress’ job to make the call as to whether the President elect and the VP elect are qualified.
This is NOT an issue for the federal courts to decide. That is because this is a “political question” – not a “legal question”. The power to make the ruling as to whether the president elect or the VP elect are qualified has been delegated to CONGRESS. Traditionally, federal courts have “abstained” from deciding “political questions”.
We study this in our first year constitutional law class, when we study judicial “abstention” from certain kinds of cases including cases which involve “political questions” or the exercise of powers delegated to the Legislative or Executive branches. When a power is delegated to one of the “political branches” (Legislative or Executive), the federal courts (the “legal branch”) have traditionally declined to interfere and substitute their judgment for that of the “political branch” to which the Power was delegated.
And what if Congress gives an ineligible person a pass – as they did with obama? WELL THEN, SHAME ON US – BECAUSE WE ARE THE ONES WHO ELECTED THOSE IGNORANT COWARDS TO OFFICE!

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When question of "natural born citizen" comes up on a p**********l candidate, it is Congress who make the call.

Then for almost 8 years, therefore Congress did not assert its duties when president Obama was elected twice into office. It was reported that there have been various factors that may not have allowed president Obama to be president. First his father was a foreigner, a student from Kenya who studied in the US. That is granting that if president Obama was born in Hawaii. So being a natural born is not applicable because of his father who is a foreigner from Kenya.

Another problem was, it was also reported that president Obama was probably born in Kenya as claimed by his aunts and relatives in Kenya.

Third, it was reported and challenged that his BC was not the original, but was computerized machine generated which indicates some variance with the true BC obtained by the Register of Birth in the State of Hawaii.

4th it was reported that the person the Hawaii official who verified Obama's BC was the only passenger who died in plane crash, the rests were all saved. Strange accident.

Did Congress neglect its duties on president Obama's legal status? Or was Congress scared of being labeled as "R****t"? I don't know the answers. I am just basing these from the various reports I've read. That is why I am asking these questions. And therefore, these are just my opinion.

With that precedence, therefore Cruz, or Rubio are both eligible to be president of the United states.