I don’t know details about Rubio’s birth, but if his parents or even one of them was in the country legally (on tourist or refugee visa, green card), he was born an undeniably legal natural born American. Not an anchor baby. Now, if BOTH parents were illegal, the country is torn because the law is very unclear - right now the powers that be seem to think that these anchor babies are Natural born Americans. I personally think we need an amendment to make only children born to people legally in America citizens.
Thanks. Yes, making the law very explicit would certain be a good move.