I don't make a lot of predictions, but here is what I think about the Wall:

Look,  the polling fact of this matter is this:  76% of those questioned by ABC News agreed with agreed with Trump.    The President is winning this argument and the Dems are fully aware of the changing tide.  It may be only a matter of time,  but the Dems really cannot afford to see public opinion turn against their position.  Both sides  will need to come to an agreement that allows each to say,  "We won."  Its called "compromise."  And that time is only days away.  

As an unexpected consequence,  the Dems fight against the Prez on this matters,  should he honestly claim a victory,  his base will be strengthened.  Trump made the promise.  It is not his doing that he has had such a difficult time.  We don't have a wall for only one reason,  and that is because of the Democrats rejection of the 2016 election.  Trump's base will demonstrate appreciation for the Trump effort at fulfilling his promises,   and they will do so in 2020. 

If there is a deal regarding the wall,  the Dems opposition to that wall will have lost on two levels,  as described above.  That is my prediction.

We can only hope for the best.