I read that Rubio was born in Miami to parents who were both Cuban citizens at the time of his birth. I have also read that it doesn't matter if Obama was born in Hawaii or not because according to the Constitution's definition, his father wasn't a citizen of the USA so Obama can't be a natural born citizen. The other arguments I have read, have people saying that because Obama's mother was a citizen and he was born here, he is a natural born citizen. So if either argument rings true. There is no possible way Rubio can be a natural born citizen if one of your parents has to be a citizen. Right?
You misread or misunderstood.
IF the President was born in Hawaii (which I assume is true), then under the law he is a U.S. citizen. Period.
IF he had been born in Kenya, however, with only one parent being a U.S. citizen at that time, but the other parent (the dad) being a citizen OF Kenya, then it would not be clear that the President would be a NATURAL BORN Citizen of the United States.
If Mr. Rubio was born IN the United States, then he IS a natural born citizen. Period.