I think he has no constitutional authority to do this.
This looks like more Right Wing government overreach that the Left uses to implement their tyranny once they get the chance.
The feds job is stop invasion AT THE BORDER. It is GOVERNMENT FAILURE not to do so. Private Americans and enterprise should not suffer the iron boot of unconstitutional government coercion because GOVERNMENT screws up.
But that is the nature of things: government screws up and you and I pay the price.
The feds job is stop invasion AT THE BORDER (U.S. Constitution, Art IV, Sec. 4). It is GOVERNMENT FAILURE not to do so. Private Americans and enterprise should not suffer the iron boot of unconstitutional government coercion because GOVERNMENT screws up.
Given that illegal immigration and immigration is invasion, given that the constitution MANDATES the feds PREVENT invasion, and given that Trump is Commander in Chief of our military, Trump has every legal ground to launch a full-scale military operation at the border to STOP INVASION.
He also has full constitutional support for building the wall which is MUCH less expensive that a full military operation although expenditures will be needed to maintain top-notch border security.
And anybody and everybody on the Left that opposes, throw the freakers over the damn wall.