Even if his EOs are overstepping their legal bounds I would not be at all surprised to see this administration try to force their implementation. The Constitution gets stepped on quite regularly by this group.
Yes, I assume he can do what he wishes and then it can be challenged by the Congress and/or in the courts. Obviously based on the current climate in Washington it is difficult to speculate on what Congress might do.
However, the scary thing to me is that the matter can be challenged in the Courts and regardless of how many Legal Scholars and previous precedents say it is un-Constitutional if the current Court says it is acceptable it then becomes Constitutional. Am I correct?