Initially, Trump tried to have it both ways; he announced a phase-out of DACA, expressed sympathy for the Dreamers, and threw the hot potato to Congress. That didn’t play well with his base, which is, above all, rabidly anti-immigrant, so he is now demanding huge concessions from the Democrats in exchange for the continuation of the program. One assumes that he thinks this is a win-win for him; the base will be happy, and the Democrats will either cave or lose support from Hispanics in future elections.
It won’t work that way. On principle, the Democrats aren’t going to fund the wall, the base will only be partly mollified, and Hispanic voters are going to blame the guy who took the hostages, not the hostages themselves. It will be just another example of how the negotiating strategies laid out in “The Art of the Deal” don’t really work in the political realm.