There is no such thing as a "LEGAL" birth, just as there is no such thing as an "ILLEGAL" birth. It's not the action of birth that is the issue, it is the status of the parent(s) that are in question.
So the below would be more appropriate.
WW
Amendment XIV
Section 1.
"All persons born TO A PERSON LEGALLY PRESENT IN THE UNITED STATES or naturalized in the United States, EXCLUDING MEMBERS OF RECOGNIZED DIPLOMATIC MISSIONS, are citizens of the United States and of the state wherein they reside. No state shall make or enforce any law which shall abridge the privileges or immunities of citizens of the United States; nor shall any state deprive any person of life, liberty, or property, without due process of law; nor deny to any person within its jurisdiction the equal protection of the laws."