Mr. Trump should not be "decamping" troops from the border.
He should be sending MORE troops towards the various weak points along the entire border.
Are there not several MORE "migrant groups" trekking northward, from as far as Brazil?
These people are not going to stop coming until it is demonstrably proven that the border has been pretty much closed and sealed and that their chances of "getting across" have been greatly diminished.
The troops should continue building border fencing along the ENTIRE length of the border -- ALL of it.
This stopped the muslims in Eastern Europe, in an emergency.
It will work here, too.