Trump is saying "deport", which an officer of the law who enforces the law is required to do with illegal aliens. When they are caught, the are arrested and deported. That is basically the way it works in countries with borders.
E-Verify will become a federal law, meaning you must have either a work visa or be a citizen to legally work in the USA, and there will be serious fines and penalties.
This will cause most of them to go back home, AKA "Self Deport".
The wall, IMO, is more about drug smuggling than people. If you can't work, what's the point? There are legal ways to come in to work agriculture, not so many legal ways for brick layers.
Republicans "Flip flop", "lie like dogs", "forget the truth", etc.
Democrats "evolve", "become enlightened", etc.