If they would send all immigrants home, many farms wouldn't have people working the fields anymore. They'd have to hire local people who in general would demand a much higher wage for that kind of work and thus prices would go up sharply. That's what always happens when some politicians try this, and the decision is rolled back quickly.
It never fails to amaze me how a certain segment of the US always gripes about foreigners stealing the jobs.
As if any weird Karen that complaints would ever be caught dead picking crops in a field. There isn’t a single one of those whiners that would ever take the job (much less be able to do it) if offered regardless of the wage.
In many cases it's just a part of the population needing an answer that is easy, quick and usually wrong as a scapegoat and right wing politicians being very happy to give it to them, preferably wrapped up in emotionally charged messages.
Facts are irrelevant in all this. Keep 'm angry to stop any critical thinking.
Considering that Brexit got through and that's exactly what's happening in the UK (amongst countless other problems), don't bet against them trying something stupid like this (regardless of when or who's in power).
Florida is doing something similar and getting the same results. Who could've known, right? They're now also making a law blocking outside workers from protection against the heat. Just to be mean and increase the worker shortage I guess.