The Constitution says that to be president, one of the requirements is that you be a "natural born" citizen.
Ted Cruz is running for president. Ted Cruz was born in Canada. His mother was an American. Is Ted "natural born"? Beats the heck outta me. He's certainly an American citizen, but is he qualified to be President?
Some say yes.
Some say no.
The Senate takes a pass.
I'm pretty sure that John McCain is natural born. If I remember correctly, he was born in the Canal Zone and his father was in the military. We tend to give a pass to Americans born outside the US while their parent is serving. And, I won't get into the birther-ism surrounding our current President.
The question remains, is a child born to American parents, but born outside the US considered "natural born"? That's a good question, and one that needs to be answered fully, and soon.
I'm just sayin'.