How?
You sound like a politician. “Uh, it’s just too hard to get rid of them” - hey, they got here, they can get back.
No. The politician is the one who issues the platitude without backing it up with a concrete plan. She stated her point of view, which is a nice first step. Now let's hear how it would be accomplished.
If it's so easy, why don't you explain how it's going to be accomplished.
How? They walked across the border, they can walk back.
The 2nd question is the easiest, fine and jail employers who use illegal labor. There are already laws in place, they just don’t use them. If it costs more to have an illegal working for you than for an American, companies will hire American’s. It’s all about the almight dollar, that’s why people hire illegals in the first place. If you’re going to jail if you get caught (my favorite) then you will make sure your I-9 is filled out correctly and use everify.