NO PRESIDENT is going to order mass deportations.
Might as well get them registered one way or the other.
But I also think we should build a wall to stop anymore, for security reasons.
but will that happen? this is the problem I have with the republican proponents of this - they never explain exactly how its going to work. sure, it would be better to "convert" these folks to be guest workers. but to do that - you have to first crack down hard on the US employers, they must be forced to hire from the guest worker pool, with tax payer IDs, etc. then, the US government has to do its job to conduct these background checks and actually operate a functioning guest worker program.
are those things going to happen?
you are right, we can't deport 12 million people at the point of a gun. but the correct incentives and properly administered programs, including the wall, need to be put in place to essentially cause them to "deport themselves" - and return as guest workers.