Simple example Obama thinks single payer health care would be the best thing. But to that they would have to almost destroy a trillion dollar industry and millions will loose jobs. So has to move with smaller steps. Trump thinks Illegal immigrants from Mexico are taking American jobs. So he just ships them all back and closes the border(builds the wall) in one go. I don't think he will consider the fact that would destroy a lot of farms in the Midwest who are surviving because of cheap Mexican labour. And if he really wants to do something about he should go gradually about it and not put a blanket stop on it. Some of his trade ideas are actually good will cause inflation but would probably also bring more jobs to the US.