This is not a good idea. I agree that building a wall isnu2019t such a hot idea. But there are hundreds of things the US has been doing to reduce illegal immigration and most of them are working (illegal immigration in to the US has been going down for 9 consecutive years now).Military are not police. When you ask the military to be policemen you degrade their capability as troops and you put them in a position they are not trained for (unless you specifically put MP units on the border).Itu2019s illegal. Posse Comitatus prohibits the US Army from engaging in law enforcement on US territory (except for military bases where they can enforce the law on-base).The troops are needed in Afghanistan.Migration happens for push and pull factors. Putting more guards (regardless of who they are) on the border doesnu2019t affect any of the push or pull factors.Senior Brass have already testified before Congress that putting troops on the border has reduced force readiness. What the American public doesnu2019t get is that when youu2019re deployed you donu2019t get many opportunities to train. And when youu2019re back in the States and then deployed to the border, that is even less time to train and refit.