“Neither of his parents was a U.S. citizen at the time of Rubio’s birth,[6] but his parents applied for U.S. citizenship and were naturalized in 1975.[5]”
https://en.m.wikipedia.org/wiki/Marco_Rubio
So, you believe the last word is that all people born of non-US citizens on US soil are, and always will be, “natural-born citizens?” Especially when they are also citizens of Cuba, first?
Some people want to make every anchor baby with no allegiance to the US and Winston Churchill (American on his mother’s side like Cruz) eligible.