Riddle me this Smart Dude. If all farm work is automated then who exactly hires 283 thousand farm workers (the number estimated by the Center for Migration Studies report, look it up). That's about 4% of undocumented workers in the U-S.
Now maybe if they (both Republicans and Democrats) actually went after the businesses that hired undocumented workers (builders, landscapers, folks that run poultry houses which are considered agricultural btw, domestic help, Trump's wife, guys like Musk who came here illegally because he lied on his visa application) it would be more effective than whatever we've done in the past.
Check your figures, Obama expelled more undocuments than Trump and built more wall.