The Mexican situation and building a wall? The Mexicans here are throwing a hissy fit at his broad statements. We're talking about illegals here..coming in illegally there are wolves coming in dressed in sheep's clothing and many are not even Mexican..but they are coming across our border and not being stopped by the Mexican Border Patrol as long as they keep moving.
Could he actually build a wall? Not likely, but he can focus more attention and support for our border patrols. He can strengthen the deportation rules and expedition of illegals making the journey less attractive and rewarding for those who try it.