The US has done this before. In June 1954, “operation wetback”, so hatefully named, involved the deportation of people viewed as Mexicans, whether they were US citizens or not

Not saying it’s ok or should be expected I’m saying it’s very possitheyll actually deport basically anyone too brown for their tastes

Operation Wetback was a collaborative effort with Mexico, who wanted their citizens back because of a lack of workers in Mexico. I do not see any new version having any co-operation from Mexico.