I'm a Trump supporter, but if he thinks this "deal" is going to be enough... well, that's gonna cost him in 2020.
Then again, the writer of "The Art of the Deal" probably has a compulsion to achieve one, if only to boast that he made "a deal". But that alone don' make America great again.
Mr. Trump has to circumvent Congress on this, using the granted powers that Congress has already bestowed upon the president with existing law. That's the only way that substantial progress towards completion of the border barrier is going to be attained in time to have an impact on the 2020 elections.
The democrat-communists will try to stop him, but I think the courts will fall on his side (in those matters that will be raised before the courts), and I don't believe Congress will override his actions (takes 2/3 in BOTH houses).
This is one of those historical situations where the president has to break new ground, and step outside the boundaries of traditional restraint.
America is under invasion -- an invasion of civilians, perhaps, but an invasion nonetheless.
It's time to put a stop to it.