This might work - if $25 billion is obtained for border security/enforcement, Trump should be able to sell it to his base. It probably makes sense to kick the can on family immigration for another day. Any change in that policy depends on where we go with respect to increasing or decreasing legal immigration in the future.
The WSJ made an excellent point today. Trumpers have no moral right to complain that about illegals "cutting in line", when they propose to take the line away. We need to decide as a nation what level of legal immigration is consistent with our values and priorities - including future economic growth and prosperity. I know where I stand.