I would like you, and everyone else, to remember something about the office of the president. This is very important:
The president does not write laws.
So when someone running for the office of president says, "I will do X," you need to ask yourself if the president is really capable of doing that.
Yes; the president can have some influence on how laws are written and which ones to write, but laws must be passed by congress first, and then approved by the president. That's how it is supposed to work. So next time some president comes along and promises "I will make dancing naked down the street covered in mustard while singing show tunes at midnight legal across the nation," you have to call him out and let him know that no, that office cannot make something legal or illegal.
The current day question, it seems, is if the office of the president has the right to outright ignore certain laws and choose not to enforce them. One can argue that the law hasn't changed, a legal or illegal act remains legal or illegal, only the enforcement of the law has changed, but to me that is a dangerous road to go down. We're supposed to live in a nation of laws, and if the president can choose to enforce or not enforce on a whim, then the laws stop mattering. To me, this is no different than unilaterally rescinding a law, as if the law never existed, a de facto change of the law.
We'll see what the Supreme Court says about this soon, I think; Obama is threatening to do just that, and I imagine there will be a challenge to his decision, and I can't imagine that it won't go all the way to the Supreme Court.
Should one decide to support (or not support) his actions, I would like to to think about what you would feel if "the other guy" was in charge and had the exact same capabilities. Don't support it because "your guy" is in office now, and then stop supporting it because "the other guy" is in office later. If it isn't right for person A to do it, then it isn't right for person B either.
I think this country would be in better shape if people focused more on principals and less on making sure that "my guy wins."