Trump has a certain style. He throws out a lot of stuff that doesn’t mean much, to see what churns the waters. And he sounds like he’s agreeing to what his opponents want, which seems to lure them into demonstrating that they’re not acting in good faith and just want the wedge issue. See also: DACA. Sure, he want’s a deal on dreamers… just as soon as Congress passes it. Congress, of course, isn’t about to pass any amnesty for dreamers. Hence, Trump can now say, “I was willing to compromise, but they weren’t.”