People are taking this wall thing too literally. He says "wall" because its much more effective than saying "we're going to have dialogue on border control". Now it may be that more sections of wall get built, but its just as likely the solution is increased surveillance. But saying that isnt as emotive.
liberals are correct, trump is taking the easy way out by signing papers. he is like a slave master. we'd all be more impressed if he was actually at the airport checking people for Syrian passports and directing those people back on the plane. or going up to the dakotas and running an excavator or down on the rio grande putting posts in the ground. only a racist white man would sign a piece of paper threatening to send in his henchmen to protect the people of chicago from criminals.