More fundamentally, DACA was NOT ended by Trump, at least not yet. Rather Trump has transferred the authority to Congress and it is Congress that will extend or end DACA. Only IF Congress refuses to act by the end of the deadline can Trump be said to have ended DACA. To sue Trump while DACA is not yet terminated is premature. The attorney generals can not know that Congress will fail to act, so there is nothing to their hand wringing. What they should do is lobby Congress in support if they want Congress to make DACA the law of the land. They are acting politically rather than legally. Give them all dunce hats.