He doesnt need to. Canadians and Mexicans can be returned immediately. For som reason OTMs can not. I hope he is addressing that issue. Due process would apply to illegals who are already here and do not have a court order already.
You should do some research on "expedited removal." It does not apply to first time offenders (not easy to determine in the field) and only if within 14 days of crossing.
Folks, don't get upset with me for pointing out the facts. Build the wall and then go back to zero tolerance.
What are OTMs?