Shut the border. Stop all trade with them. Collect on all loans, demand repayment of all aid given to them in the last 50 years. Freeze all accounts that mexican companies have here. Give notice that all Mexican nationals have 2 months to leave, whether they are legal or illegal. After that put them into labor camps. When they pay off the cost of closing the border, the raped welfare, medical, education ,etc system, we'll air drop them back to Mexico. Right after I get a good carne asada recipe from them. If they want to fight, good. Since our mil is busy we can use strictly air power. We won't even invade. A bunch Daisy cutter's and such. Everytime a mass of troops forms, we'll pound them into the dust. Whenever the mexican pres calls for war, we destroy the capital with them. Mexico city is on a lake right? Hmmm, man made tidal wave with hi explosives?
If your coming here to be a productive part of society, great, welcome to america. If your coming here for the free ride, FOAD.