14th Amendment first sentence:
"All persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States and of the State wherein they reside. "
Aliens, including those with residence permits, are NOT subject to the jurisdiction of the United States. They are subject to the jurisdiction of their homeland governments, and live in the US under terms of treaties.
This is why the man born in Philadelphia to Jamaica citizen parents is NOT a US Citizen unless he has gone through the naturalization process to remove his allegiance and nexus to Jamaica and replace it with allegiance and nexus to the United States.
The story fails to say whether Brown's parents were Jamaica citizens. If Brown's parents were Jamaica citizens at the time of his birth in Philadelphia, then Brown is also a Jamaica citizen.
The President has the duty to enforce the US Constitution and laws pursuant thereto, regardless of the politically motivated edicts of the US Supreme Court and whining of leftists in Congress. He could start deporting people like Brown in the above cited article who claim, but do not have, US Citizenship.