Trump said he would extend DACA if the Dems would work with Reps on comprehensive immigration reform, which actually upset some of those that voted for him. Trump was willing to sacrifice part of his original campaign position to get a deal and law thru congress. The threat of pulling DACA Trump wanted to use to force Congress to sit down and make some laws to take care of this. Trump was forced to litigate this to get it off high center one way or the other. If the Supreme Court determines DACA can be rescinded and is not legal, it will put pressure on Congress to act. The Dems will blame Trump for all of this. Trump will blame the do nothing Dem House for being a do nothing party that just investigates, and who suffers? The Dreamers and immigration reform. Congress will do nothing because each side will think they can use this issue to help them get elected. Typical Washington D.C. bullshit, the people come last.