Try not to beat me up too bad but why not
Annex Mexico as the 51st State??
They would have their own state reps in congress
they would pay taxes to support themselves
-leverage US military to clean their swamp
-leverage US military and business to build up infrastructure
they have MANY natural resources to tap into
They have a strong southern boarder wall.
they have beautiful beaches
they have beautiful people.
Immigration problem solvedโฆ.