Congress can override an Executive Order -- if it poaches on their area of responsibility.
This Congress would not, of course, do such a thing. But the next Congress might...
Couldn’t Zero just issue a mass pardon for illegals like Carter did for the Vietname War era draft dodgers.
Congress “might” will most likely, vis-s-vis Obama’s EOs, not be good enough. Moreover, by the time the Congress gets around to acting the destruction may have become fully entrenched, the damage done and irreversible.
Why yes, yes they can, but in this case Congress is merely hiding behind the President, while he carries out their will. Cool huh? The get to be again it while all the while cheering silently behind the scene.