People on this thread seem to be having difficulty with language or logic or both. You asked, "How do you think the illegals in Massachusetts, Minnesota and Wyoming get there?" You didn't ask how they get to, or across, the border. Few are being driven from near the border to Massachusetts &c., in private vehicles. (Such rollovers as you describe just do not happen on the long drive north, do they?)
ML/NJ
Do you own a mirror?
Go to the station at Laramie Wyoming, right off of I-80 @ 3rd street and check out the parking lot sometime about 6:00 AM. If there aren't a car or two full of illegals everyday gassing up and loading up on junk food then I'll buy you lunch.
If that doesn't change your mind, consider that Denver is a "sanctuary city" and one of the first destinations north of Arizona for carloads of illegals.