Greg Sargent at the Post spells it out about the white nationalist motivation.
… Read the restThis year Democrats repeatedly offered Trump deals with money for the wall in exchange for protecting the dreamers, and he rejected them all, because Trump also wanted deep cuts to legal immigration. After that, multiple immigration packages failed to pass the Senate. The one based on Trump’s framework — citizenship for 1.8 million dreamers traded for $25 billion in wall money and deep cuts to legal immigration — got the fewest votes, at 39, with 14 Republicans defecting.
The bottom line is that Trump will not accept anything that protects the dreamers unless it also contains deep cuts to legal immigration. But nothing like
