Oh, all the clowns are lining up to say they'll undo Obama's executive order.
I hate to break this to you but a President's EO is not law. The executive branch of government cannot establish laws. That is the function of the legislature. Anything he does by EO is not enforceable and can't be upheld in courts. Furthermore, the EO can simply be abolished as soon as the next president enters office.
What Obama is doing is actually going to end up harming Hillary Clinton. The republican nominee will simply point out that unless you elect a republican, all these illegitimate EOs written by Obama will remain in effect under Hillary and the only chance of getting rid of any of this shit is if we elect a republican.
So sit back... pop yourself some popcorn, and get ready to have a lesson in civics shoved down your miserable throats in short order... it's coming.