Well, yeah. But that doesn't mean that Trump had to agree. Waiting until 2018 meant two more years of illegals. It should have been: No wall = veto.
By the way, by "wall" I mean anything that would defend the border. The Hungarians do well with just barbed wire. The number of illegals entering Hungary now is essentially zero.
The Hungarian border:

Learn how items are funded. President can’t even allocate funds to maintain the White House. Every spending bill must originate in the House of Reps. President can veto any bill, but can’t initiate even $1 spending by himself.
Yes, that kinda fence and wire could’ve been up in a month with less money than the taxpayer’s give NPR.