That's why in fields where this isn't uncommon you drill and drill and drill your response until it becomes second nature. If you don't comply you are still an

That's why in fields where this isn't uncommon you drill and drill and drill your response until it becomes second nature. If you don't comply you are still an American citizen. CBP cannot deny you entry for any reason (yet). However, they can make your life hell for as long as legally possible. If you are prepared for that then you absolute can and should tell them to pound sand. Just like you should to the police. But standing up for yourself has consequences you may not be prepared for. In both cases, CBP and police, you may be isolated from your loved ones, harassed, interrogated, etc in an attempt to make you crack. The difference, in a "border zone"[1] 100 miles from any border you effectively lose several important rights so the stakes are far, far higher. But, if you are truly innocent, it is worth the time to exercise your fourth and fifth amendment. As long as you present the correct paperwork the officer can't do much. However, they CAN lie. So it's imperative you know your rights to not talk yourself into probable cause. [1] https://www.aclu.org/know-your-rights/border-zone https://www.aclu.org/know-your-rights/border-zone