I disagree. Mr. Trump is a builder, he builds big things. The wall would be his crowning achievement. I think, if for no other reason than his ego, President Trump wants to build the wall. I also believe he does care about this country and knows that the wall is vital.
The wall is like 'Lock Her Up', he didn't mean a word of it, he just wanted the leverage.
If Trump really wanted the wall he would have pushed it in 2017.