Unfortunately only citizenship guarantees entry. Visas and green cards are more like guidelines. Very strong guidelines, but guidelines non-the-less. Only a DH

Unfortunately only citizenship guarantees entry. Visas and green cards are more like guidelines. Very strong guidelines, but guidelines non-the-less. Only a DHS agent can grant entry to non-citizens. On a case by case basis. I imagine the questions are going to get harder. No more easy peasy things like "Where do you work?", "Why are you coming?", "Are you staying?".