I understand that the consitution also applies to people who are illegal in the United States. This is very important for people who travel to the United States by plane and are rejected entrance for some reason, for example having certain messaged on social media, and are thus declared illegals to be send home. The idea that I as an EU member could be deported to El Salvador, is enough reason for me to not consider to travel to the USA and advice everyone to avoid doing it as well, especially if the are of (mixed) color.