They can try. All you have to do is get to Mexico somehow and then wade across the shallow part of Eagle Pass in Texas. I don't know if you need permission from the cartel though. The border partrol will make you stand together as a group and put you on a bus to be in-processed in a nearby facility after an hour or two. You will be given you a court date for your asylum request immigration hearing which you can safely ignore. You will never have legal status after this illegal entry but your paperwork is enough to get a drivers license in many places and you will not be deported unless you complain or otherwise make yourself known. You can just repeat the process later on if this doesn't work out the first time. After that buses chartered by an NGO will bring you from the processing center to a major metropolitan area like New York City. You will be given free housing and food.