This is not similar to the Obama kerfuffle in my opinion. With Obama, people were saying that he forged his birth certificate and was not born in Hawaii. He was born within the jurisdiction of the United States, he proved it ....and yet they all yammered on.

With Cruz, we know that he was not born within the jurisdiction of the United States, so, there's a legal question as to the meaning of natural born. With no Supreme Court decision directly on point, we can't know for sure what natural born means, all we can do is guess.