Sure. It was great. Until they released ALL the illegals they captured within hours.
This is what the law is not what I prefer it to be so don't shoot the messenger. Remember there are 3 branches of Government and in this case the President's role is to catch them only and then it goes to the Judiciary which the President has NO control over.
Illegal Immigration or Undocumented Worker is a legal term which means that if law enforcement is going to charge the individuals with a legal statute then the charged has a right to adjudication (trial by judge or jury) and being the charges are only a misdemeanor, law enforcement is limited in the amount of time they can hold an individual pending trial. Unless the President suspends habeas corpus, it's not up to the accused to prove who they are or aren't, it's up to law enforcement and prosecutors to prove who they are or aren't. This legal standard is going to be the hardest thing Congress will deal with because there is Constitutional bounds that will definitely make it's way to the Supreme Court.