You know, I don't think you're a stupid guy, but it's amazing how you keep buying in to these media traps.
They want to shame Trump for his deportations, so they latch on to a mistake (like the government never does that) and try to manipulate the question of whether the process was correct into him bypassing the Constitution. Obviously the answer to "Do you have to uphold the Constitution?" is yes. But in their spin the question is "Does a bureaucratic mistake mean you're violating your oath of office?" To which a good answer is basically "I'm not an attorney, nor do I play one on TV. That's why we have lawyers to handle the law."
Naturally the trap is there's no winning answer with the media. If he answers the broad constitutional question with yes they'll cast it as he's knowingly violating his oath of office. If he gives the answer he gave, he has no clue about the constitution.
Lose/lose for him, but win/win for the media and your TDS.