[PGR88]

He plans to scour the country for unauthorized immigrants and deport people by the millions per year.

without a kind of military-style mobilization, the US government has no institutional capacity to do such a thing, and it would be fought/sabotaged every step of the way by leftist states, courts and localities.

But on the other hand, I appreciate the big ideas.

[TimSkalaBim]

Self-deportation is the way. Illegal aliens will leave when their untaxed remittances to their home countries are confiscated.

[frog in a pot]

(re: scour the country for unauthorized immigrants and deport people by the millions per year)
...without a kind of military-style mobilization, the US government has no institutional capacity to do such a thing. ...it would be fought/sabotaged every step of the way by leftist states, courts and localities.

Bingo, and fought by RINO's as well!

Now, (re: your "localities") lets add many small American towns in places like Kansas and Texas (to name just two with which I am familiar) that have become largely, if not overwhelmingly populated by multi-generation families some of members of which are legal and some of whom are not. That part of the plan would be by any definition, "ripping families apart" and likely to be met with hostile resistance.

Then let's add the difficulties (and agreement costs) of getting those millions of illegals back to their countries of origin with the acceptance of those countries.

One wonders how much, if any, toothpaste Trump can indeed put back in the tube.