Open borders … one way or the other.
The next serious challenge will be from the “independent” Judiciary. The argument will be that Trump is impeding a reasonable (in the eye of the beholder) asylum claim flow rate (for humanitarian reasons) and the migrants rights are being violated.
The ruling will be that ANY non-citizen anywhere anytime has the unfettered right to cross safely and quickly onto US soil and ask for asylum for any “humanitarian reason. The wait time for a hearing will be 10 to 40 years because of the flood of applicants. To find and deport those denied asylum will be another 10 to 40 years.
The net effect is legal US residency for a long period of time WITH significant asylee benefits.