I am not in favor of kicking 800,000 largely productive people out of the country, and have no doubt that won't happen. Do you think their jobs are going to be filled by unemployed Americans, just dying to install roofs and lay bricks? Right, sure, that will happen . . .
But for once, I do agree with Trump that the Congress should get off its ass and pass immigration laws, i.e., do their damn job. Way too much power has over the years landed on the President's death, maybe all the way back to the Gulf of Tonkin resolution where Lyndon Johnson was given a blank check, leading to 58,000 US KIA for no apparent reason that anyone has ever identified.
The bottom line is this: bammer took action changing immigration laws. He stepped outside his authority. Trump is trying to right a wrong (one of many) by putting it where it belongs...in the lap of Congress. If they want to change the law or not, let them....and let them suffer whatever consequences they suffer.