Despite all the hoopla about original intent, that's what most judges do when it comes to judicial review.Thus, "All persons born or naturalized in the United States . . . are citizens." As Scalial says, he looks at the text, not the intent.
Original intent is always nebulous and uncertain in reviewing acts of congress because you must consider the views of a number of people which may represent contrasting opinions. In the case of the 14th Amendment, Howard explained that the citizenship clause would exclude the children born of foreigners that were not diplomats. In Senate debates the Senator from California stated he believed it would apply to children born of foreigners in United States and he would vote for the amendment.
As Scalial pointed out, it is text that he looks at; that is original meaning. Intent is highly subjective; meaning of text is not. One need only consult dictionaries at the time of the legislation to determine meaning. This leaves little room for argument.
The prevailing definition in 18th century of jurisdiction of the United States is precisely what it is today. If congress really intended to exclude children of all foreigners, not just diplomats, they would have said so and not used the word jurisdiction.
http://webstersdictionary1828.com/ates.