As far as I know, DEA isn’t rolling around major cities showing up to random places of business to see if everyone working there are carrying any drugs and then abducting them away without due process. Only ICE and CBP are doing this.
What do you mean "abducting without due process"? You mean checking documents and making arrests if they don't have them?
Due process is a feature of the judicial phase, not the executive/enforcement phase (especially with regards to Immigration law)
With regards to the limitations on ICE themselves... They're largely only bound by reasonable suspicion with regards to who they can question and ultimately detain/arrest upon the results of that questioning.
This is right from the Immigrant Defense Project (an organization that's on the side of the undocumented immigrants)
While an ICE officer may not enter a residential home without a judicial warrant, exigent circumstances, or consent, ICE officers are only required to have “reasonable suspicion” (RS) of an immigration violation to initiate a car stop or a detainment for the purposes of questioning in a public place.
See Navarette v. California, 572 U.S. 393, 396-97 (2014). Section 287 of the Immigration and Nationality Act (INA), 8 U.S.C. § 1357, authorizes ICE officers to interrogate and arrest noncitizens for suspected immigration violations. Under implementing regulations, ICE officers can detain individuals for questioning if the officer has a “reasonable suspicion, based on specific articulable merits, that the person being questioned is, or is attempting to be, engaged in an offense or is illegally in the United States.” 8 C.F.R. § 287.8(b)
The standard for determining whether an action was justified by reasonable suspicion is an objective one, not dependent on the intentions or motivations of the particular detaining officer. Illinois v. Wardlow, 582 U.S. 119, 123 (2000); see also, e.g., United States v. Singletary, 798 F.3d 55, 59 (2d Cir. 2015) (examining “the totality of the circumstances through the eyes of a reasonable and cautious officer”).
United States v. Brignoni-Ponce, 422 U.S. 873, 884 (1975). Officers may “draw on their own experience and training” in making this judgment, id., looking to factors including:
• Proximity to an international border;
• Patterns of behavior;
• An officer’s previous experience with undocumented individuals;
• An officer’s knowledge of “[r]ecent illegal border crossings in the area”;
• In matters of vehicle stoppages, a driver’s erratic driving or obvious attempts to evade officers;
While some people may suggest it's "Un-PC" to say, the reality is, receiving a tip that there is a factory employing undocumented workers (who's been busted for things like that before) is not "random"... Neither is approaching day laborers standing out front of a Home Depot that's in a city that's close to the US-Mexico border. A reasonable person (who's being honest) would acknowledge the fact that a group of 15 non-English speakers (who are clearly of Mexican descent) standing out in front of a home improvement store in El Paso with a sign that says "trabajo" is significantly more likely to be undocumented than a group of people speaking fluent English in the parking lot of a restaurant in Des Moines Iowa.
People keep saying it's "Random"... if it was random, I would've seen ICE Agents showing up at the Target that's 5 miles from me here in Northeast Ohio and stopping random people.
To be honest, I think the thing that makes some people mad (the people who want to cling to the notion that you can't infer certain things by evaluating certain superficial aspects), is specifically how un-random it is.
The proof of how un-random it actually is demonstrated in the numbers.
When they do these days-long series of nationwide sweeps and apprehend several thousands of people, and it ends up where the overwhelming majority were, indeed, undocumented, with a small handful of mistaken apprehensions, the news outlets are off to the races going on at length about the 3 guys who were mistakenly picked up (and then later released) and conveniently leave out the fact that the other 14,997 were, indeed, what ICE agents suspected.
Meaning it's not random...if it were random it would be a jump ball in terms of the outcome statistics.