It’s not clear how much could be done along the 2,000-mile border without additional actions by Congress. Lawmakers passed the Secure Fence Act of 2006, but most of those 700 miles have already been built. Some areas are in much better shape than others, though, and long stretches are made up of fencing that stops vehicles but not pedestrians.
But whatever steps might be taken without Congress’ approval would be likely to fall short of the extravagant new wall on the border that Trump repeatedly said Mexico would pay for during his campaign for the White House. And despite Congress’ involvement in approving any spending, such an approach might also open Trump to charges of circumventing the House and the Senate to take unilateral actions, something he repeatedly criticized President Barack Obama for doing. A spending bill including money for border construction could also provoke a legislative showdown given potential opposition from Senate Democrats.
Still, several lawmakers and congressional officials said the administration could have significant flexibility in taking additional steps without Congress’ approval.
